Unit 1 Water单元重点易错专项复习题2026-2027学年沪教版（五四学制八年级英语上册

**基本信息** 聚焦9大重点易错考点，以“易错点系统提炼+三级分层训练”构建方法体系，知识逻辑从语法规则到词汇应用、从句法结构到语境综合递进，提升语言能力与思维品质。 **专项设计** |模块|题量/典例|方法提炼|知识逻辑| |----|-----------|----------|----------| |被动语态等9大考点|每考点9题（3基础+3提升+3拓展）|提炼结构公式（如“情态动词+be+过去分词”）、易错标志（如被动“be+done”）、转换规则（主动→被动）|从核心语法（被动语态/从句）到主题词汇（水循环/环保），再到综合语境应用，形成“规则→辨析→迁移”逻辑链|

Unit 1 Water 专项复习 沪教版（五四学制）八年级上册 Unit 1 Water 单元重点易错专项复习题 使用说明 本卷精选 9 大重点易错考点，每个考点含基础题 3 道 + 提升题 3 道 + 拓展题 3 道（用适当形式填空），共 81 题。紧扣 2026最新教材核心词汇与语法，体现层次性和差异性，适合单元复习与考前冲刺。 考点 1 被动语态（一般现在时）am/is/are + 过去分词 常见易错点 易错点：①结构：主语 + am/is/are + 过去分词（V-ed）：Water is used every day. / The tap is turned off. / Factories are built near the river.；②被动标志：be + done，强调承受者而非执行者：The river is polluted by the factory.；③常见动词过去分词：use→used, pollute→polluted, save→saved, waste→wasted, treat→treated, recycle→recycled, protect→protected, freeze→frozen, boil→boiled, evaporate→evaporated；④主动→被动转换：People use water → Water is used (by people).；⑤否定：be not + done：The water is not polluted.；⑥疑问：Is water...? / Are rivers...?；⑦常见错误：Water is use (✗) → Water is used (✓)；The tap turn off (✗) → The tap is turned off (✓)；⑧不可遗漏 be 动词。 ▷ 基础题 （选择题） ▷ （ ）1 Water ______ in many ways every day. We drink it, cook with it and clean with it. A. uses B. is used C. used D. was used ▷ （ ）2 The tap ______ every time after we wash our hands. It is a good habit. A. turns off B. turned off C. is turned off D. was turned off ▷ （ ）3 Fresh water ______ from rivers, lakes and underground sources. A. is collected B. collects C. collected D. was collected ◇ 提升题 （选择题 · 难度提升） ◇ （ ）1 The lake near our school ______ seriously. We can see rubbish in it. A. pollutes B. is polluting C. is polluted D. polluted ◇ （ ）2 Why ______ the windows ______ so often in this classroom? It is dusty. A. do; clean B. are; cleaned C. is; cleaned D. does; clean ◇ （ ）3 The wastewater from the factory ______ before it goes into the river. A. treats B. treated C. is treating D. is treated ★ 拓展题 （用适当的形式填空） ★ （ ）1 （用括号中单词的适当形式填空）Every day, millions of litres of water ______ (use) by people around the world. In Jinan, water ______ (take) from underground and rivers. It ______ (clean) carefully before it reaches our homes. Then it ______ (deliver) to every house through pipes. ★ （ ）2 （用括号中单词的适当形式填空）The water in this river ______ (pollute) by a chemical factory last year. Now the water ______ (not treat) properly. Many fish ______ (die) because of the dirty water. Something must ______ (do) to save the river. ★ （ ）3 （用括号中单词的适当形式填空）Lily asked how rainwater ______ (collect) in Kunming. Her teacher told her that rainwater ______ (catch) in big tanks on the rooftops. Then it ______ (filter) and ______ (use) for watering plants. 考点 2 情态动词被动语态：must/should/can + be + 过去分词 常见易错点 易错点：①结构：情态动词 + be + 过去分词：Water should be saved. / The tap must be turned off. / Wastewater can be recycled. / The river ought to be protected.；②常见情态动词：must（必须）/ should（应该）/ can（能够）/ may（可以）/ ought to（应当）/ needn't（不必）；③否定：情态动词 + not + be + done：Water needn't be wasted.；④疑问：Should water...? / Must the tap...?；⑤常见错误：Water should save (✗ 主动) → Water should be saved (✓ 被动)；The river must protect (✗) → The river must be protected (✓)；⑥重点句：We must save water. = Water must be saved. (主动转被动)；⑦ought to be done = should be done；⑧be able to be done 表能力：The problem can be solved. ▷ 基础题 （选择题） ▷ （ ）1 Water ______ every day. It is a precious resource for all living things. A. must save B. must be saved C. must be save D. must is saved ▷ （ ）2 The tap ______ when you brush your teeth. Don't let it run. A. should turn off B. should be turned off C. should turned off D. should be turn off ▷ （ ）3 Wastewater ______ before it is poured into rivers. This is the law. A. must treat B. must be treat C. must be treated D. must treated ◇ 提升题 （选择题 · 难度提升） ◇ （ ）1 The chemical factory ______ to stop pouring waste into the lake. A. ought to tell B. ought to be told C. ought be told D. ought telling ◇ （ ）2 The water in this area is very dirty. It ______ before drinking. A. must clean B. must be cleaned C. must cleaned D. must is cleaned ◇ （ ）3 More trees ______ along the river to protect the water from pollution. A. should plant B. should be plant C. should be planted D. should planted ★ 拓展题 （用适当的形式填空） ★ （ ）1 （用括号中单词的适当形式填空）Water ______ (must, save) by everyone. The tap ______ (should, turn off) after use. Wastewater ______ (must, treat) before it goes back to nature. Rivers ______ (ought to, protect) for future generations. ★ （ ）2 （用 can/can't/must/should 填空）______ water ______ (should, recycle) in many ways. Old water from washing vegetables ______ (can, use) to water plants. But dirty water ______ (must, not, drink) directly. Every drop ______ (must, save) because fresh water is limited. ★ （ ）3 （用括号中单词的适当形式填空）Jam learned that rainwater ______ (can, collect) on rooftops. It ______ (should, not, waste). His teacher said that everyone ______ (must, do) something to save water. He decided that a plan ______ (would, make) at school. 考点 3 水循环与状态变化词汇 (evaporate/condense/freeze/boil/melt/turn into) 常见易错点 易错点：①evaporate = 蒸发（液体→气体，吸热）：Water evaporates when heated.；②condense = 凝结（气体→液体，放热）：Water vapour condenses into clouds.；③freeze = 冻结（液体→固体）：Water freezes at 0°C.；④boil = 沸腾（液体→气体）：Water boils at 100°C.；⑤melt = 融化（固体→液体）：Ice melts when it gets warm.；⑥turn into = 变成（状态变化）：Water turns into ice when it freezes. / Ice turns into water when it melts.；⑦常见错误：evaporate 不及物常不加宾语 (✗ Water evaporates it)；condense 凝结 ≠ condense 压缩混淆；⑧搭配：at a temperature of + 温度 / in three states（solid, liquid, gas）；⑨water cycle = 水循环（evaporation → condensation → precipitation）。 ▷ 基础题 （选择题） ▷ （ ）1 Water ______ when it is heated to 100°C at sea level. It becomes steam. A. freezes B. melts C. evaporates D. boils ▷ （ ）2 Ice ______ into water when the temperature rises above zero degrees. A. freezes B. melts C. boils D. evaporates ▷ （ ）3 Water vapour in the sky ______ and forms clouds. Then it falls as rain. A. evaporates B. boils C. freezes D. condenses ◇ 提升题 （选择题 · 难度提升） ◇ （ ）1 At the North Pole, water always ______ in winter because the temperature is below zero. A. melts B. freezes C. boils D. evaporates ◇ （ ）2 The three ______ of water are solid, liquid and gas. We can see all three in nature. A. forms B. states C. shapes D. types ◇ （ ）3 When you leave a glass of water in the sun, some of it will slowly ______ away. A. freeze B. melt C. evaporate D. condense ★ 拓展题 （用适当的形式填空） ★ （ ）1 （用括号中单词的适当形式填空）Water ______ (boil) at 100°C and ______ (turn) into steam. When steam cools down, it ______ (condense) back into water. If the temperature drops below 0°C, water ______ (freeze) into ice. ★ （ ）2 （用括号中单词的适当形式填空）The lake in Kunming ______ (evaporate) quickly under the hot sun. Some water vapour ______ (rise) into the sky and ______ (condense) to form clouds. Then the clouds ______ (bring) rain back to the earth. ★ （ ）3 （用 freeze/boil/melt/evaporate 填空）When you heat ice, it first ______ into water. If you keep heating, the water will ______. On the other hand, if you put water in a very cold place, it will ______. After it snows, the snow gradually ______ when the sun comes out. 考点 4 不可数名词 water 的量词表达 (a drop of / a litre of / two bottles of) 常见易错点 易错点：①water 不可数名词，不能直接加 a/an 或复数：a water (✗) → a drop of water / a glass of water (✓)；②常用量词：a drop of water (一滴水) / a glass/cup of water (一杯水) / a bottle of water (一瓶水) / a litre of water (一升水) / three litres of water (三升水) / two bottles of water (两瓶水)；③复数体现在量词上：two glasses of water / several litres of water / many drops of water；④搭配：billions of litres of water / a great amount of water / much water / a little water；⑤常见错误：many water (✗) → much water / a lot of water (✓)；waters (✗ 除非指水域)；⑥a piece of ice (一块冰) / a block of ice (一大块冰)；⑦three kilos of cotton (三公斤棉布) 类似用法。 ▷ 基础题 （选择题） ▷ （ ）1 We need three ______ of water to cook this dish. Please fill them up. A. litre B. litres C. water D. waters ▷ （ ）2 There is only ______ water left in the bottle. We should get some more. A. a few B. many C. a little D. several ▷ （ ）3 ______ of water fell from the tap. It was just enough to wet the floor. A. A drop B. A few drops C. Many drops D. Several litres ◇ 提升题 （选择题 · 难度提升） ◇ （ ）1 The factory uses billions of ______ of water every day. That is too much. A. litre B. litres C. water D. waters ◇ （ ）2 Can you pass me two ______ of water? I am very thirsty after the run. A. bottle B. bottles C. glass D. cup ◇ （ ）3 There is ______ water in the desert. People there value every single drop. A. a few B. many C. little D. several ★ 拓展题 （用适当的形式填空） ★ （ ）1 （用括号中单词的适当形式填空）We drink about two ______ (litre) of water every day. Jam bought three ______ (bottle) of water for the trip. There was only ______ (a little) water left in his bottle after the hike. He wished he had brought more ______ (glass) of water. ★ （ ）2 （用括号中单词的适当形式填空）Lily used five ______ (kilo) of cotton to make clothes. She also needed several ______ (litre) of water for the dyeing process. A ______ (drop) of blue dye changed the colour completely. She realised how much ______ (water) was needed. ★ （ ）3 （用 a drop of/a litre of/much/many 填空）______ water is wasted every day in our school. Students often leave the tap running. We should save every ______ water. Each person drinks about ______ water per day. How ______ litres of water do you use? 考点 5 核心动词辨析 pollute / save / waste / protect / recycle / treat 常见易错点 易错点：①pollute = 污染（及物）：Factories pollute rivers. / The air is polluted.；②save = 节约/拯救：save water (节约水) / save lives (救命) / save energy (节能)；③waste = 浪费（及物）：Don't waste water! / waste time / waste energy；④protect = 保护：protect the environment / protect...from... (保护……免受)；⑤recycle = 回收利用：recycle paper/water/plastic / recycled water (中水)；⑥treat = 处理/对待：treat wastewater (处理废水) / treat...as... (把……当作)；⑦常见错误：pollute 动词 ≠ pollution 名词 (不可数)；save 节约 ≠ waste 浪费（反义词）；⑧搭配：water treatment (水处理) / wastewater treatment plant (污水处理厂)；⑨protect...from... = 保护免受：protect rivers from pollution. ▷ 基础题 （选择题） ▷ （ ）1 Factories should not ______ the river with chemicals. It kills the fish. A. save B. waste C. pollute D. recycle ▷ （ ）2 We must ______ water every day. Turn off the tap when you brush your teeth. A. pollute B. waste C. save D. treat ▷ （ ）3 Don't ______ water when you take a shower. Use only what you need. A. save B. waste C. protect D. recycle ◇ 提升题 （选择题 · 难度提升） ◇ （ ）1 The new plant can ______ wastewater and make it clean enough to drink. A. pollute B. waste C. treat D. recycle ◇ （ ）2 We should ______ the environment ______ pollution. It is our duty. A. protect; from B. save; from C. pollute; from D. treat; for ◇ （ ）3 ______ paper and plastic can help reduce the amount of waste we produce. A. Polluting B. Wasting C. Saving D. Recycling ★ 拓展题 （用适当的形式填空） ★ （ ）1 （用括号中单词的适当形式填空）The factory ______ (pollute) the river for years. Many fish died. Now the government is taking action. The water ______ (treat) in a new plant. People are asked to ______ (save) water and not to ______ (waste) it. The river will be ______ (protect) by law. ★ （ ）2 （用括号中单词的适当形式填空）Lily ______ (recycle) all her plastic bottles. She also ______ (save) water by taking shorter showers. Her family ______ (treat) old water from the washing machine and ______ (use) it to water the garden. They try not to ______ (pollute) the environment. ★ （ ）3 （用 pollute/save/waste/protect/recycle 填空）We should never ______ water because it is precious. Factories must not ______ rivers with chemicals. Everyone can ______ water by turning off the tap. We should also ______ paper and plastic bottles. Most importantly, we must ______ the environment for future generations. 考点 6 词性转换 (pollute→pollution / conserve→conservation / treat→treatment / value→valuable) 常见易错点 易错点：①动词→名词后缀：pollute (v.) → pollution (n. 不可数) / conserve (v.) → conservation (n.) / treat (v.) → treatment (n.) / evaporate (v.) → evaporation (n.) / condense (v.) → condensation (n.)；②形容词→名词：important (adj.) → importance (n.) / valuable (adj.) → value (n.) / rare (adj.) → rarity (n.)；③名词→形容词：dirt (n.) → dirty (adj.) / salt (n.) → salty (adj.) / use (n./v.) → useful (adj.) / useless (adj.)；④常见错误：pollutions (✗ 不可数) → pollution (✓)；importance 不可数；useful 反义词 useless；⑤water pollution (水污染) / water conservation (节水) / wastewater treatment (废水处理) / the importance of water (水的重要性)；⑥valuable = 有价值的 ≠ value (n. 价值 vt. 重视)；⑦rare (稀少的) ≠ rarely (adv. 很少)。 ▷ 基础题 （选择题） ▷ （ ）1 Water ______ is a serious problem in many parts of the world today. A. pollute B. pollution C. polluting D. pollutants ▷ （ ）2 We must understand the ______ of saving water. It is more important than we think. A. important B. importance C. importantly D. importances ▷ （ ）3 Water is a ______ resource. We should cherish every drop we have. A. value B. valuable C. valueless D. valued ◇ 提升题 （选择题 · 难度提升） ◇ （ ）1 The new wastewater ______ plant has made the river clean again. A. treat B. treating C. treatment D. treats ◇ （ ）2 Clean water is becoming increasingly ______ in dry areas. People travel far to get it. A. rare B. rareness C. rarely D. rares ◇ （ ）3 After the ______ of water, the lake became beautiful again. Fish returned. A. conserve B. conservation C. conserving D. conserved ★ 拓展题 （用适当的形式填空） ★ （ ）1 （用括号中单词的适当形式填空）The ______ (pollute) of the river was caused by a factory. After years of ______ (conserve) efforts, the water is clean now. The ______ (treat) process takes several hours. People now understand the ______ (important) of protecting water. ★ （ ）2 （用括号中单词的适当形式填空）Jam learned about water ______ (conserve) at school. He realised that water is very ______ (value). He decided to stop ______ (waste) it. His teacher said that even small actions have great ______ (important) for the future. ★ （ ）3 （用括号中单词的适当形式填空）The ______ (evaporate) of water from the lake was very fast in summer. The ______ (salty) of the sea water makes it undrinkable. We must pay attention to water ______ (pollute). Without clean water, life on earth would be ______ (use). 考点 7 条件状语从句 (If + 一般现在时, 主句 + will/can/should) 主将从现 常见易错点 易错点：①结构：If + 一般现在时，主句 + will/can/may/should + 动词原形：If it rains, we will stay inside.；②主将从现规则：if 从句用现在时，主句用将来时：If we save water, there will be enough for everyone.；③unless = if...not：Unless we act now, the river will dry up. = If we don't act now...；④常见错误：If it will rain (✗) → If it rains (✓)；If he will come (✗) → If he comes (✓)；主句用 will 不用 would（真实条件）；⑤科学事实可用 If + 一般现在时, 主句 + 一般现在时：If you heat water to 100°C, it boils.；⑥if 引导的条件句位置灵活：If it rains, I will stay. = I will stay if it rains.；⑦unless 后不接 not：unless...not (✗) → unless... (✓)。 ▷ 基础题 （选择题） ▷ （ ）1 If it ______ tomorrow, we will stay at home and read books about water. A. will rain B. rains C. rained D. is raining ▷ （ ）2 Unless we ______ water now, there will be a serious shortage in the future. A. save B. will save C. saved D. are saving ▷ （ ）3 If you heat water to 100°C, it ______ into steam. This is a scientific fact. A. will turn B. turns C. turned D. is turning ◇ 提升题 （选择题 · 难度提升） ◇ （ ）1 We ______ have enough clean water in the future if we don't protect our rivers. A. don't B. didn't C. won't D. aren't ◇ （ ）2 Unless the factory ______ its wastewater properly, the fish in the river will die. A. treats B. will treat C. treated D. is treating ◇ （ ）3 If everyone ______ to save water, the problem of water shortage can be solved. A. try B. tries C. will try D. tried ★ 拓展题 （用适当的形式填空） ★ （ ）1 （用括号中单词的适当形式填空）If it ______ (not rain) this month, the lake in Jinan will become even smaller. Unless people ______ (use) less water, the underground supply ______ (run) out soon. If we all ______ (do) our part, there ______ (be) enough water for everyone. ★ （ ）2 （用 if/unless 填空）______ you heat ice, it melts. ______ we save water every day, future generations will have enough. ______ the government makes strict laws, factories will keep polluting rivers. ______ everyone understands the problem, we can find a solution together. ★ （ ）3 （用括号中单词的适当形式填空）If the temperature ______ (drop) below zero tonight, the water in the pool ______ (freeze). Unless Jam ______ (wear) warm clothes, he ______ (catch) a cold. If they ______ (not turn off) the tap, water will be wasted. 考点 8 时间状语从句 (when / before / after / as soon as / until) + 主将从现 常见易错点 易错点：①when + 一般现在时，主句 + will：When the sun rises, the fog disappears. / When it rains, we stay inside.；②before + 现在时，主句 + will：Turn off the tap before you leave. / Wash your hands before you eat.；③after + 现在时，主句 + will：After the water is treated, it can be drunk.；④as soon as + 现在时，主句 + will：As soon as it stops raining, we will go out.；⑤until = 直到……为止：We cannot drink the water until it is clean. / Don't turn on the tap until you need it.；⑥主将从现：时间状语从句中用现在时代替将来时：When it will rain (✗) → When it rains (✓)；⑦not...until 直到……才：He didn't stop wasting water until he saw the dry river.；⑧as 当……时（同时发生）：As the water heats up, it begins to boil. ▷ 基础题 （选择题） ▷ （ ）1 ______ you go to bed, make sure to turn off the tap. Don't waste water. A. After B. Before C. As soon as D. Until ▷ （ ）2 As soon as the rain stops, we ______ outside to collect some in buckets. A. go B. goes C. will go D. went ▷ （ ）3 We cannot drink the water ______ it is properly treated at the plant. A. after B. when C. until D. as soon as ◇ 提升题 （选择题 · 难度提升） ◇ （ ）1 When the temperature ______ 100°C, water starts to boil rapidly. A. will reach B. reaches C. reached D. is reaching ◇ （ ）2 ______ the wastewater is cleaned, it can be reused for watering plants. A. Before B. After C. Until D. As soon as ◇ （ ）3 Don't leave the classroom ______ the teacher tells you to. Wait for permission. A. after B. when C. until D. as ★ 拓展题 （用适当的形式填空） ★ （ ）1 （用括号中单词的适当形式填空）When the sun ______ (rise) in the morning, the dew on the grass ______ (begin) to evaporate. After the water ______ (heat) to the right temperature, it ______ (boil). The whole process ______ (take) about ten minutes. ★ （ ）2 （用 when/before/after/until 填空）______ Jam finishes his homework, he helps his mum with housework. He always washes his hands ______ meals. ______ he uses the tap, he makes sure not to waste water. He doesn't leave the bathroom ______ he turns off the light. ★ （ ）3 （用括号中单词的适当形式填空）As soon as the bell ______ (ring), students ______ (rush) to the playground. When the teacher ______ (come) in, everyone ______ (be) quiet. They don't start the experiment ______ the teacher ______ (give) instructions. 考点 9 单元重点词汇综合 (shortage/precious/rare/chemical/factory/resource/environment) 常见易错点 易错点：①shortage (n.) 短缺：a shortage of water / water shortage / be short of (缺少)；②precious (adj.) 宝贵的：Water is precious. / precious resource；③rare (adj.) 稀少的/珍贵的：rare animals / rare plants / rarely (adv.) 很少；④chemical (n.) 化学品 (adj.) 化学的：chemical factory / chemical waste / chemistry (n.) 化学；⑤factory (n.) 工厂：factory workers / near the factory；⑥resource (n.) 资源（常用复数 resources）：natural resources / water resources / human resources；⑦environment (n.) 环境：protect the environment / environmental (adj.) 环境的 / environmentally friendly 环保的；⑧搭配：a serious shortage of / precious resource / rare species / chemical pollution / save resources / protect the environment；⑨environmentally friendly = 环保的。 ▷ 基础题 （选择题） ▷ （ ）1 Fresh water is becoming very ______ in many parts of the world. We must save it. A. common B. precious C. cheap D. ordinary ▷ （ ）2 There is a serious water ______ in this area. Many people have no clean water. A. short B. shorten C. shortage D. shortly ▷ （ ）3 We must protect the ______ from pollution. Clean air and water are essential. A. resource B. environment C. factory D. chemical ◇ 提升题 （选择题 · 难度提升） ◇ （ ）1 The ______ factory has caused serious pollution in the nearby river. A. chemistry B. chemical C. chemicals D. chemically ◇ （ ）2 This kind of fish is very ______. It only lives in clean, unpolluted water. A. common B. usual C. rare D. ordinary ◇ （ ）3 We should use ______ friendly products that do not harm the environment. A. resource B. environment C. environmentally D. environmental ★ 拓展题 （用适当的形式填空） ★ （ ）1 （用括号中单词的适当形式填空）Water is one of the most ______ (precious) resources on earth. Many countries face a serious water ______ (short). Some animals are becoming ______ (rare) because their habitats are destroyed. We must use ______ (chemistry) carefully and protect our natural ______ (resource) for the future. ★ （ ）2 （用括号中单词的适当形式填空）The ______ (factory) in this area produce a lot of waste. The ______ (environment) impact is huge. ______ (chemistry) from these factories pollute the rivers. People are working hard to make the area more ______ (environment) friendly. They hope to reduce pollution and save water ______ (resource). ★ （ ）3 （用 shortage/precious/rare/chemical/environment 填空）Water is a ______ resource that we cannot live without. In some desert areas, there is a serious water ______. The ______ is also damaged by human activities. ______ factories must be controlled by law. Some animals become ______ because their homes are destroyed by pollution. 参 考 答 案 与 详 细 解 析 考点一：被动语态（一般现在时） （1） 答案：B 解析：水被使用，is used 被动。选 B。 （2） 答案：C 解析：tap 被关掉，is turned off 被动。选 C。 （3） 答案：A 解析：水被收集，is collected 被动。选 A。 （4） 答案：C 解析：湖被污染，is polluted 被动。选 C。 （5） 答案：B 解析：windows 复数，are cleaned 被动。选 B。 （6） 答案：D 解析：废水被处理，is treated 被动。选 D。 （7） 答案：is used; is taken; is cleaned; is delivered 解析：全部被动：is used 被使用；is taken 被取；is cleaned 被清洁；is delivered 被输送。 （8） 答案：was polluted; is not treated; have died; be done 解析：was polluted 被污染（过去）；is not treated 没被处理；have died 已死亡；be done 被做。 （9） 答案：is collected; is caught; is filtered; is used 解析：全部被动：is collected 被收集；is caught 被接住；is filtered 被过滤；is used 被使用。 考点二：情态动词被动语态 （1） 答案：B 解析：must be saved 必须被节约。选 B。 （2） 答案：B 解析：should be turned off 应该被关掉。选 B。 （3） 答案：C 解析：must be treated 必须被处理。选 C。 （4） 答案：B 解析：ought to be told 应该被告知。选 B。 （5） 答案：B 解析：must be cleaned 必须被清洁。选 B。 （6） 答案：C 解析：should be planted 应该被种植。选 C。 （7） 答案：must be saved; should be turned off; must be treated; ought to be protected 解析：must be saved 必须被节约；should be turned off 应该被关；must be treated 必须被处理；ought to be protected 应该被保护。 （8） 答案：should be recycled; can be used; must not be drunk; must be saved 解析：should be recycled 应该被回收；can be used 可以被用；must not be drunk 绝不能喝；must be saved 必须被节约。 （9） 答案：can be collected; should not be wasted; must do; would be made 解析：can be collected 能被收集；should not be wasted 不应被浪费；must do 必须做（主动）；would be made 将被制定。 考点三：水循环与状态变化词汇 （1） 答案：D 解析：水在100°C沸腾。选 D。 （2） 答案：B 解析：冰融化成水。选 B。 （3） 答案：D 解析：水蒸气凝结成云。选 D。 （4） 答案：B 解析：在北极水总是结冰。选 B。 （5） 答案：B 解析：水的三种状态。选 B。 （6） 答案：C 解析：水在太阳下蒸发。选 C。 （7） 答案：boils; turns; condenses; freezes 解析：boils 沸腾；turns into 变成；condenses 凝结；freezes 冻结。 （8） 答案：evaporates; rises; condenses; bring 解析：evaporates 蒸发；rises 上升；condenses 凝结；bring 带来。 （9） 答案：melts; boil; freeze; melts 解析：melts 融化；boil 沸腾；freeze 冻结；melts 融化。 考点四：不可数名词 water 的量词表达 （1） 答案：B 解析：three litres 三升（复数）。选 B。 （2） 答案：C 解析：water 不可数，用 a little 修饰。选 C。 （3） 答案：A 解析：a drop of water 一滴水。选 A。 （4） 答案：B 解析：billions of litres 数十亿升。选 B。 （5） 答案：B 解析：two bottles 两瓶（复数）。选 B。 （6） 答案：C 解析：little water 几乎没有水（不可数）。选 C。 （7） 答案：litres; bottles; a little; glasses 解析：litres 升；bottles 瓶；a little 一点；glasses 杯。 （8） 答案：kilos; litres; drop; water 解析：kilos 公斤；litres 升；drop 滴；water 水（不可数）。 （9） 答案：Much; drop of; a litre of; many 解析：Much water 许多水；a drop of 一滴；a litre of 一升；many litres 许多升。 考点五：核心动词辨析 （1） 答案：C 解析：pollute 污染河流。选 C。 （2） 答案：C 解析：save water 节约水。选 C。 （3） 答案：B 解析：waste water 浪费水。选 B。 （4） 答案：C 解析：treat wastewater 处理废水。选 C。 （5） 答案：A 解析：protect...from 保护免受。选 A。 （6） 答案：D 解析：recycling 回收。选 D。 （7） 答案：has polluted; is treated; save; waste; protected 解析：has polluted 已污染；is treated 被处理；save 节约；waste 浪费；protected 被保护。 （8） 答案：recycles; saves; treats; uses; pollute 解析：recycles 回收；saves 节约；treats 处理；uses 使用；pollute 污染。 （9） 答案：waste; pollute; save; recycle; protect 解析：waste 浪费；pollute 污染；save 节约；recycle 回收；protect 保护。 考点六：词性转换 （1） 答案：B 解析：pollution 不可数名词。选 B。 （2） 答案：B 解析：importance 重要性（不可数）。选 B。 （3） 答案：B 解析：valuable 宝贵的（形容词）。选 B。 （4） 答案：C 解析：treatment plant 处理厂。选 C。 （5） 答案：A 解析：rare 稀少的（形容词）。选 A。 （6） 答案：B 解析：conservation 保护（名词）。选 B。 （7） 答案：pollution; conservation; treatment; importance 解析：pollution 污染；conservation 保护；treatment 处理；importance 重要性。 （8） 答案：conservation; valuable; wasting; importance 解析：conservation 保护；valuable 有价值的；wasting 浪费；importance 重要性。 （9） 答案：evaporation; salinity; pollution; useless 解析：evaporation 蒸发；salinity 含盐量；pollution 污染；useless 无用的。 考点七：条件状语从句（主将从现） （1） 答案：B 解析：if 从句用现在时 rains。选 B。 （2） 答案：A 解析：unless 从句用现在时 save。选 A。 （3） 答案：B 解析：科学事实，主句也用一般现在时 turns。选 B。 （4） 答案：C 解析：主将从现，主句 won't have。选 C。 （5） 答案：A 解析：unless 从句用现在时 treats。选 A。 （6） 答案：B 解析：everyone 三单，tries。选 B。 （7） 答案：does not rain; use; will run; do; will be 解析：does not rain 不下雨；use 使用；will run 将耗尽；do 做；will be 将有。 （8） 答案：If; If; Unless; If 解析：If 如果；If 如果；Unless 除非；If 如果。 （9） 答案：drops; will freeze; wears; will catch; do not turn off 解析：drops 下降；will freeze 将结冰；wears 穿；will catch 将感冒；do not turn off 不关。 考点八：时间状语从句 （1） 答案：B 解析：before 在……之前。选 B。 （2） 答案：C 解析：主将从现，主句 will go。选 C。 （3） 答案：C 解析：not...until 直到……才。选 C。 （4） 答案：B 解析：when 从句用现在时 reaches。选 B。 （5） 答案：B 解析：after 在……之后（水被处理后）。选 B。 （6） 答案：C 解析：not...until 直到……才。选 C。 （7） 答案：rises; begins; is heated; boils; takes 解析：rises 升起；begins 开始；is heated 被加热；boils 沸腾；takes 花费。 （8） 答案：When; before; When; until 解析：When 当……时；before 在……之前；When 当……时；until 直到。 （9） 答案：rings; will rush; comes; will be; until; gives 解析：rings 响；will rush 将冲；comes 来；will be 将是；until 直到；gives 给。 考点九：单元重点词汇综合 （1） 答案：B 解析：precious 宝贵的。选 B。 （2） 答案：C 解析：shortage 短缺。选 C。 （3） 答案：B 解析：environment 环境。选 B。 （4） 答案：B 解析：chemical factory 化工厂。选 B。 （5） 答案：C 解析：rare 稀少的。选 C。 （6） 答案：C 解析：environmentally friendly 环保的。选 C。 （7） 答案：precious; shortage; rare; chemicals; resources 解析：precious 宝贵的；shortage 短缺；rare 稀少的；chemicals 化学品；resources 资源。 （8） 答案：factories; environmental; Chemicals; environmentally; resources 解析：factories 工厂；environmental 环境的；Chemicals 化学品；environmentally 环保地；resources 资源。 （9） 答案：precious; shortage; environment; Chemical; rare 解析：precious 宝贵的；shortage 短缺；environment 环境；Chemical 化学的；rare 稀少的。 —— 沪教版（五四学制）八年级上册 Unit 1 Water 单元重点易错专项复习题 完 —— 第 页 学科网（北京）股份有限公司 $