Unit 4 Safety first单元知识总结及重点易错（专项训练）-2026-2027学年译林版（三起）英语五年级上册

**基本信息** 该专项训练以Unit 4 "Safety first"为核心，聚焦十大考点，通过基础-提升-拓展三级题组系统提炼情态动词、祈使句等语法规则与安全词汇应用，构建从知识辨析到情景语用的逻辑链，提升语言能力与安全意识。 **专项设计** |模块|题量/典例|方法提炼|知识逻辑| |----|-----------|----------|----------| |十大考点|每考点9题（3基础+3提升+3拓展）|情态动词should/shouldn't、can/can't用法；祈使句结构；safe/safety/safely词性转换；情景安全规则判断|从词汇（如safe词性）到短语（如warm up），再到句型（如How can we keep safe?），最终综合语用，形成"概念-规则-应用"递进逻辑|

译林版（三起）五年级上册 Unit 4 Safety first 重点易错专项训练 最新译林版（三起）五年级上册Unit 4 Safety first 单元知识总结及重点易错专项训练含详细解析 说明：本练习紧扣最新教材 Unit 4 Safety first，精选 10 个重点易错考点，每个考点含基础题×3、提升题×3、拓展题×3，共 90 题。 重点单词 单词 音标 词性 释义 易错提醒 safe /seɪf/ adj. 安全的 反义词 dangerous；名词 safety；副词 safely warm /wɔːm/ v./adj. 热身；温暖的 warm up 是固定短语 push /pʊʃ/ v. 推 反义词 pull（拉），注意拼写 pull /pʊl/ v. 拉，拽 pull one's clothes 拉扯某人的衣服 jump /dʒʌmp/ v. 跳，跳跃 jump from the stairs 从楼梯跳下 climb /klaɪm/ v. 攀登，爬 climb trees 爬树（危险行为） hurt /hɜːt/ v. 受伤，疼痛 原形与过去式同形；my leg hurts stairs /steəz/ n.(pl) 楼梯 只用复数！on the stairs slowly /ˈsləʊli/ adv. 慢慢地 slow(adj.) + ly = slowly(adv.) careful /ˈkeəfl/ adj. 小心的 Be careful! 祈使句，省略 you safety /ˈseɪfti/ n. 安全 Safety comes first! 安全第一 should /ʃʊd/ modal v. 应该 后接动词原形，无人称变化 shouldn't /ˈʃʊdnt/ modal v. 不应该 = should not 缩写 重点短语 1. keep safe 保证安全 2. warm up 热身 / 做准备活动 3. go swimming 去游泳 4. swimming pool 游泳池 5. run on the stairs 在楼梯上奔跑 6. keep to the right 靠右行走 7. jump from the stairs 从楼梯上往下跳 8. push others 推搡别人 9. pull one's clothes 拉扯某人的衣服 10. move out of the way 让路 11. sit down 坐下 12. right now 立刻，马上 13. walk slowly 慢慢走 14. be careful 小心 15. shout for help 大声呼救 重点句型 1. We should warm up first. 我们应该先热身。 2. You shouldn't run on the stairs. 你不应该在楼梯上奔跑。 3. How can we keep safe in PE class? 我们怎样在体育课上保证安全？ 4. It's time for PE! 该上体育课了！ 5. Be careful. 小心。 6. Are you OK? 你还好吗？ 7. My leg hurts. I can't move. 我的腿疼，我动不了了。 8. But I can't wait! 但是我等不及了！ 重点语法 should / shouldn't + 动词原形（无人称变化）：We should warm up. He shouldn't push others. can / can't + 动词原形（表能力/许可）：I can swim. You can't run here. 祈使句（省略主语 you）：肯定以动词原形开头（Be careful.）；否定以 Don't 开头（Don't push.） It's time for + 名词 / It's time to + 动词原形：It's time for PE. = It's time to have PE. 形容词变副词：slow → slowly，修饰动词用副词（walk slowly） safe(adj.) / safely(adv.) / safety(n.) 词性转换：keep safe / drive safely / road safety 十大考点速览 考点1：should + 动词原形（应该做某事） 考点2：shouldn't + 动词原形（不应该做某事） 考点3：can / can't 表示能力与许可 考点4：祈使句：Be careful / Don't ... 考点5：How can we keep safe? 问答句型 考点6：第三人称单数动词变化 (he/she + -s/-es) 考点7：safe / safely / safety 词性辨析 考点8：It's time for + 名词 / It's time to + 动词原形 考点9：否定祈使句 vs should 否定句的区别 考点10：综合语用：安全规则情景判断 考点1：should + 动词原形（应该做某事） ◇ 基础题（选择题） ◇ (1) We ______ warm up first in PE class. A.should B.shoulds C.shoulding D.shoulded ◇ (2) Olivia is tired. She ______ have a rest now. A.shoulds B.should C.shoulding D.shoulded ◇ (3) Lily ______ do her homework carefully. A.shoulding B.shoulded C.should D.shoulds ▷ 提升题（选择题） ▷ (1) Chen Wei has a cold. He ______ see a doctor. A.should B.shoulded C.shoulds D.shoulding ▷ (2) It's cold outside. You ______ wear a coat. A.shoulded B.shoulds C.shoulding D.should ▷ (3) The baby is crying. Bella ______ check on him. A.shoulds B.should C.shoulding D.shoulded ★ 拓展题（选择题） ★ (1) Zhang Hao wants to keep safe. He ______ follow the rules. A.shoulded B.shoulds C.should D.shoulding ★ (2) They are lost. They ______ ask a policeman for help. A.should B.shoulds C.shoulding D.shoulded ★ (3) Zhou Kai has a fever. He ______ stay in bed. A.shoulds B.shoulded C.shoulding D.should 考点2：shouldn't + 动词原形（不应该做某事） ◇ 基础题（选择题） ◇ (1) You ______ run on the stairs. It's not safe. A.should not to B.shouldn't to C.shouldn'ting D.shouldn't ◇ (2) We ______ push others in PE class. A.shouldn't B.shouldn't to C.should not to D.shouldn'ting ◇ (3) He ______ climb trees. It's dangerous. A.shouldn't to B.shouldn'ting C.shouldn't D.should not to ▷ 提升题（选择题） ▷ (1) Jam ______ eat too much candy. It's bad for his teeth. A.shouldn't to B.shouldn't C.shouldn'ting D.should not to ▷ (2) Lily ______ sit down right after running. She should walk slowly. A.shouldn'ting B.shouldn't to C.should not to D.shouldn't ▷ (3) They ______ play with fire. It's very dangerous. A.shouldn't B.shouldn't to C.shouldn'ting D.should not to ★ 拓展题（选择题） ★ (1) Olivia ______ talk to strangers online. It's not safe. A.should not to B.shouldn't to C.shouldn't D.shouldn'ting ★ (2) Chen Wei ______ cross the road when the light is red. A.shouldn'ting B.shouldn't C.shouldn't to D.should not to ★ (3) Bella ______ use her phone while walking on the stairs. A.shouldn't to B.should not to C.shouldn'ting D.shouldn't 考点3：can / can't 表示能力与许可 ◇ 基础题（选择题） ◇ (1) Willy ______ swim very well. He is good at it. A.cans B.caning C.can D.is can ◇ (2) I ______ wait to open my birthday present! A.can not to B.cans not C.am not can D.can't ◇ (3) ______ I use your pencil, please? — Sure. A.Can B.Cans C.Are can D.Caning ▷ 提升题（选择题） ▷ (1) Olivia ______ ride a bike, but she ______ drive a car. A.can; cans not B.can; can't C.cans; can't D.caning; can't ▷ (2) Jam is only five. He ______ tie his shoes by himself yet. A.cans not B.isn't can C.can't D.can not to ▷ (3) ______ we go swimming in the lake? — No, it's dangerous. A.Cans B.Are can C.Caning D.Can ★ 拓展题（选择题） ★ (1) Zhang Hao is good at sports. He ______ run fast and ______ jump high. A.can; can B.cans; can C.caning; can D.can; cans ★ (2) Lily is too short. She ______ reach the top shelf. A.cans not B.can't C.isn't can D.can not to ★ (3) They ______ hear the music from the next room. It's too loud. A.caning B.are can C.can D.cans 考点4：祈使句：Be careful / Don't ... ◇ 基础题（选择题） ◇ (1) ______ careful! The floor is wet. A.Is B.Being C.Are D.Be ◇ (2) ______ push your classmates. It's not safe. A.Don't B.Not C.No D.Isn't ◇ (3) ______ run in the classroom. Walk, please. A.No B.Don't C.Not D.Isn't ▷ 提升题（选择题） ▷ (1) ______ out of the way, please. You're blocking the door. A.Moves B.Moving C.Move D.To move ▷ (2) ______ sit down right now. Walk slowly first. A.No B.Not C.Isn't D.Don't ▷ (3) ______ warm up before you swim, Willy. A.Do B.Does C.Doing D.To do ★ 拓展题（选择题） ★ (1) ______ quietly in the library. Everyone is reading. A.Is B.Be C.Are D.Being ★ (2) ______ climb on the desk. It's dangerous. A.No B.Not C.Don't D.Isn't ★ (3) — Well done, boys and girls! — ______ A.Don't do that. B.Do well done. C.Does well done. D.No word is needed. 考点5：How can we keep safe? 问答句型 ◇ 基础题（选择题） ◇ (1) — How can we keep safe in PE class? — We ______ warm up first. A.shoulds B.are should C.shoulding D.should ◇ (2) — How can we keep safe on the stairs? — We ______ keep to the right. A.should B.shoulds C.shoulding D.are should ◇ (3) — How can they keep safe at school? — They ______ push others. A.should not to B.shouldn't C.shouldn't to D.shouldn'ting ▷ 提升题（选择题） ▷ (1) — How can Zhang Hao keep safe when swimming? — He ______ warm up first. A.shoulds B.are should C.should D.shoulding ▷ (2) — How can Olivia and Jam keep safe in the park? — They ______ play near the lake. A.should not to B.shouldn't to C.shouldn'ting D.shouldn't ▷ (3) — How can we keep safe in the science lab? — We ______ listen to the teacher. A.should B.shoulds C.shoulding D.are should ★ 拓展题（选择题） ★ (1) — How can Lily keep safe when cooking? — She ______ touch the hot pan. A.should not to B.shouldn't C.shouldn't to D.shouldn'ting ★ (2) — How can we keep safe on a bus? — We ______ sit down and ______ run. A.should; shouldn't to B.shoulds; shouldn't C.should; shouldn't D.shoulding; shouldn't ★ (3) — How can Chen Wei keep safe riding a bike? — He ______ wear a helmet and ______ ride too fast. A.shoulds; shouldn't B.should; should not to C.shoulding; shouldn't D.should; shouldn't 考点6：第三人称单数动词变化 (he/she + -s/-es) ◇ 基础题（选择题） ◇ (1) Willy ______ into the water without warming up. A.go B.goes C.going D.to go ◇ (2) She ______ slowly after running. A.walk B.walking C.walks D.to walk ◇ (3) He ______ his clothes when he climbs. A.pull B.pulling C.to pull D.pulls ▷ 提升题（选择题） ▷ (1) Olivia ______ warm up before every swim. She is very careful. A.does B.do C.doing D.to do ▷ (2) Jam ______ push his little brother. Mum is angry. A.push B.pushes C.pushing D.to push ▷ (3) Bella ______ to the teacher carefully in class. A.listen B.listening C.listens D.to listen ★ 拓展题（选择题） ★ (1) Zhou Kai ______ up very early every morning to exercise. A.get B.getting C.gets D.to get ★ (2) Lily ______ the stairs every day. She lives on the 10th floor! A.climbs B.climb C.climbing D.to climb ★ (3) Chen Wei ______ his homework before dinner every day. A.do B.does C.doing D.to do 考点7：safe / safely / safety 词性辨析 ◇ 基础题（选择题） ◇ (1) We should keep ______ at school. A.safely B.safety C.safe D.safes ◇ (2) Please drive ______ on the way to school. A.safe B.safety C.safes D.safely ◇ (3) ______ comes first! We must follow the rules. A.Safety B.Safe C.Safely D.Safes ▷ 提升题（选择题） ▷ (1) The children crossed the road ______ with their teacher. A.safe B.safely C.safety D.safes ▷ (2) Wearing a helmet is a ______ habit when riding a bike. A.safely B.safety C.safe D.safes ▷ (3) We learned a lot about road ______ in today's class. A.safe B.safely C.safes D.safety ★ 拓展题（选择题） ★ (1) The plane landed ______ at the airport. Everyone was happy. A.safely B.safe C.safety D.safes ★ (2) Seat belts are important ______ equipment in every car. A.safe B.safety C.safely D.safes ★ (3) Are the students ______ when they do experiments? — Yes, the teacher watches them. A.safely B.safety C.safe D.safes 考点8：It's time for + 名词 / It's time to + 动词原形 ◇ 基础题（选择题） ◇ (1) It's time ______ PE. Let's go to the sports ground! A.to B.at C.on D.for ◇ (2) It's time ______ go to school. Hurry up! A.to B.for C.at D.on ◇ (3) It's time ______ dinner. Mum is calling us. A.to B.for C.at D.on ▷ 提升题（选择题） ▷ (1) It's time ______ warm up before the race, runners! A.at B.on C.to D.for ▷ (2) It's time ______ bed. The children are very tired. A.at B.on C.to D.for ▷ (3) It's time ______ say goodbye. The bus is leaving. A.to B.for C.at D.on ★ 拓展题（选择题） ★ (1) Olivia, it's time ______ lunch. What would you like to eat? A.to B.for C.at D.on ★ (2) It's time ______ do our homework. Stop playing games! A.at B.on C.to D.for ★ (3) It's time ______ the school trip. Are you excited, children? A.at B.on C.to D.for 考点9：否定祈使句 vs should 否定句的区别 ◇ 基础题（选择题） ◇ (1) ______ run on the stairs. → 这是祈使句（命令/提醒） A.Not B.No C.Isn't D.Don't ◇ (2) You ______ run on the stairs. It's dangerous. → 这是建议句 A.shouldn't B.should not to C.shouldn't to D.shouldn'ting ◇ (3) ______ climb trees. It's not safe for little kids. A.Not B.Don't C.No D.Isn't ▷ 提升题（选择题） ▷ (1) Teacher: '______ pull others' clothes.' This is a classroom rule. A.Not B.No C.Don't D.Isn't ▷ (2) Chen Wei: 'You ______ jump from the stairs. Please walk.' A.should not to B.shouldn't to C.shouldn'ting D.shouldn't ▷ (3) Mum: '______ play with matches, Bella.' → 祈使句，语气强 A.Don't B.Not C.No D.Isn't ★ 拓展题（选择题） ★ (1) Which sentence is a suggestion, NOT a command? ______ A.Don't eat too much. B.You shouldn't eat too much. C.No eating. D.Stop eating. ★ (2) At school: '______ push in line.' → 这是规则标识（祈使句） A.Not B.No C.Don't D.Isn't ★ (3) Doctor: 'You ______ work too hard. You need a rest.' → 建议 A.should not to B.shouldn't to C.shouldn'ting D.shouldn't 考点10：综合语用：安全规则情景判断 ◇ 基础题（选择题） ◇ (1) In the swimming pool, you should ______ first. A.eat lunch B.run fast C.climb trees D.warm up ◇ (2) On the stairs, we should ______. A.keep to the right B.run fast C.jump D.push others ◇ (3) After running, you should ______. A.sit down right now B.walk slowly C.run faster D.jump up ▷ 提升题（选择题） ▷ (1) Olivia's leg hurts after swimming. She should ______. A.swim more B.run fast C.see a doctor D.climb stairs ▷ (2) In the classroom, you shouldn't ______. A.read books B.write carefully C.listen to the teacher D.run ▷ (3) Jam wants to go swimming. His mum says he should ______ first. A.warm up B.eat a big meal C.run on the stairs D.push his friend ★ 拓展题（选择题） ★ (1) Which of the following is the BEST safety tip for PE class? A.Run fast and jump high. B.Warm up first and don't push others. C.Eat snacks during exercise. D.Climb the rope without help. ★ (2) Zhou Kai is giving a safety speech. Which sentence fits BEST? A.We should run on stairs to save time. B.We should push others in line. C.We should listen to teachers and keep to the right. D.We should climb trees every day. ★ (3) Lily is writing a safety poster. Which title is the BEST? A.Run Fast! B.Climb High! C.Push Hard! D.Safety First! 参考答案 考点 基础题 提升题 拓展题 考点1 A B C A D B C A D 考点2 D A C B D A C B D 考点3 C D A B C D A B C 考点4 D A B C D A B C D 考点5 D A B C D A B C D 考点6 B C D A B C C A B 考点7 C D A B C D A B C 考点8 D A B C D A B C D 考点9 D A B C D A B C D 考点10 D A B C D A B C D 详细解析 考点1：should + 动词原形（应该做某事） ◇ 基础题 (1) 答案：A。 should 是情态动词，后接动词原形，无人称和数的变化。 (2) 答案：B。 should 后永远接动词原形 have，无人称变化，不用 shoulds。 (3) 答案：C。 should 没有人称变化，Lily 是第三人称单数也用 should。 ▷ 提升题 (1) 答案：A。 should 后接动词原形 see，表示建议他应该看医生。 (2) 答案：D。 should 后接动词原形 wear，主语 you 不影响 should 的形式。 (3) 答案：B。 should 后接动词原形 check，表示建议她应该去看看。 ★ 拓展题 (1) 答案：C。 should 后接动词原形 follow，表达建议他应该遵守规则。 (2) 答案：A。 should 后接动词原形 ask，主语 They 不影响 should 的形式。 (3) 答案：D。 should 后接动词原形 stay，表示建议他应该卧床休息。 考点2：shouldn't + 动词原形（不应该做某事） ◇ 基础题 (1) 答案：D。 shouldn't = should not，后接动词原形 run，不接 to。 (2) 答案：A。 shouldn't 后接动词原形 push，表示不应该推搡别人。 (3) 答案：C。 shouldn't 后接动词原形 climb，主语 he 不影响 should 的形式。 ▷ 提升题 (1) 答案：B。 shouldn't 后接动词原形 eat，表示不应该吃太多糖果。 (2) 答案：D。 shouldn't 后接动词原形 sit，跑步后不应该立刻坐下。 (3) 答案：A。 shouldn't 后接动词原形 play，表示不应该玩火。 ★ 拓展题 (1) 答案：C。 shouldn't 后接动词原形 talk，表示不应该和陌生人网上聊天。 (2) 答案：B。 shouldn't 后接动词原形 cross，红灯时不应该过马路。 (3) 答案：D。 shouldn't 后接动词原形 use，走楼梯时不应该看手机。 考点3：can / can't 表示能力与许可 ◇ 基础题 (1) 答案：C。 can 表示能力，后接动词原形 swim，无人称变化。 (2) 答案：D。 can't wait 是固定搭配，表示迫不及待，to 后接动词原形。 (3) 答案：A。 Can I ...? 表示请求许可，情态动词提前到句首。 ▷ 提升题 (1) 答案：B。 can 表能力，can't = can not 表不能，两者后都接动词原形。 (2) 答案：C。 can't 表示没有能力做到，后接动词原形 tie。 (3) 答案：D。 Can we ...? 询问是否可以做某事，否定回答用 No, you can't。 ★ 拓展题 (1) 答案：A。 can 表能力，and 连接两个并列的 can + 动词原形结构。 (2) 答案：B。 can't 表示没有能力，too short 是原因提示。 (3) 答案：C。 can 表示能够（感官能力），后接动词原形 hear。 考点4：祈使句：Be careful / Don't ... ◇ 基础题 (1) 答案：D。 祈使句以动词原形开头，Be careful! 省略主语 you。 (2) 答案：A。 否定祈使句用 Don't + 动词原形，Don't push! 不要推！ (3) 答案：B。 Don't run 是否定祈使句，要求不要在教室里奔跑。 ▷ 提升题 (1) 答案：C。 肯定祈使句用动词原形 Move 开头，省略主语 you。 (2) 答案：D。 Don't sit down 是否定祈使句，建议不要立刻坐下。 (3) 答案：A。 Do 在这里是动词原形，构成肯定祈使句，表示做……动作。 ★ 拓展题 (1) 答案：B。 Be quiet! 是祈使句，省略主语 you，表示保持安静。 (2) 答案：C。 Don't climb 是否定祈使句，禁止爬桌子。 (3) 答案：D。 Well done! 是固定表扬用语，不是祈使句，不需要加 Do。 考点5：How can we keep safe? 问答句型 ◇ 基础题 (1) 答案：D。 How can we ...? 询问方式，回答用 should + 动词原形。 (2) 答案：A。 keep to the right 靠右行走，should 后接动词原形。 (3) 答案：B。 否定回答用 shouldn't + 动词原形 push。 ▷ 提升题 (1) 答案：C。 How can + 主语 + keep safe? 回答用 should/shouldn't + 动词原形。 (2) 答案：D。 湖边玩耍危险，用 shouldn't play 给出安全建议。 (3) 答案：A。 在实验室应听老师指导，should listen 表建议。 ★ 拓展题 (1) 答案：B。 热锅危险，用 shouldn't touch 提醒不要碰。 (2) 答案：C。 should sit 和 shouldn't run 并列，表达安全规则。 (3) 答案：D。 should wear 和 shouldn't ride 都是 should 后接动词原形。 考点6：第三人称单数动词变化 (he/she + -s/-es) ◇ 基础题 (1) 答案：B。 Willy 是第三人称单数，一般现在时 go 变 goes。 (2) 答案：C。 She 是第三人称单数，walk 加 -s 变 walks。 (3) 答案：D。 He 是第三人称单数，pull 加 -s 变 pulls。 ▷ 提升题 (1) 答案：A。 Olivia 是第三人称单数，do 变 does。 (2) 答案：B。 Jam 是第三人称单数，push 加 -es 变 pushes。 (3) 答案：C。 Bella 是第三人称单数，listen 加 -s 变 listens。 ★ 拓展题 (1) 答案：C。 Zhou Kai 是第三人称单数，get 加 -s 变 gets。 (2) 答案：A。 Lily 是第三人称单数，climb 加 -s 变 climbs。 (3) 答案：B。 Chen Wei 是第三人称单数，do 变 does。 考点7：safe / safely / safety 词性辨析 ◇ 基础题 (1) 答案：C。 keep safe 中 safe 是形容词作表语，表示保持安全的状态。 (2) 答案：D。 safely 是副词，修饰动词 drive，表示安全地驾驶。 (3) 答案：A。 Safety 是名词，作主语。Safety comes first! 安全第一！ ▷ 提升题 (1) 答案：B。 safely 副词修饰动词 crossed，表示安全地过马路。 (2) 答案：C。 safe 形容词修饰名词 habit，表示安全的习惯。 (3) 答案：D。 road safety 道路安全，safety 是名词，作介词 about 的宾语。 ★ 拓展题 (1) 答案：A。 safely 副词修饰动词 landed，表示安全着陆。 (2) 答案：B。 safety equipment 安全设备，safety 名词作定语修饰 equipment。 (3) 答案：C。 safe 形容词作表语，are safe 表示处于安全的状态。 考点8：It's time for + 名词 / It's time to + 动词原形 ◇ 基础题 (1) 答案：D。 It's time for + 名词（PE），表示该上体育课了。 (2) 答案：A。 It's time to + 动词原形 go，表示该去上学了。 (3) 答案：B。 It's time for + 名词（dinner），表示该吃晚饭了。 ▷ 提升题 (1) 答案：C。 warm up 是动词短语，用 It's time to + 动词原形。 (2) 答案：D。 bed 是名词，用 It's time for + 名词。 (3) 答案：A。 say 是动词原形，用 It's time to + 动词原形。 ★ 拓展题 (1) 答案：B。 lunch 是名词，用 It's time for + 名词。 (2) 答案：C。 do 是动词原形，用 It's time to + 动词原形。 (3) 答案：D。 the school trip 是名词短语，用 It's time for + 名词。 考点9：否定祈使句 vs should 否定句的区别 ◇ 基础题 (1) 答案：D。 祈使句省略主语 you，否定用 Don't + 动词原形。 (2) 答案：A。 shouldn't 后接动词原形，表示你不应该在楼梯上跑。 (3) 答案：B。 Don't climb 是否定祈使句，禁止爬树。 ▷ 提升题 (1) 答案：C。 课堂规则用祈使句 Don't pull ... 表达禁止。 (2) 答案：D。 shouldn't jump 是建议/劝告语气，比祈使句更委婉。 (3) 答案：A。 Don't play 祈使句表达强烈的禁止语气。 ★ 拓展题 (1) 答案：B。 You shouldn't ... 是建议/劝告，Don't ... 是命令/规则。 (2) 答案：C。 标识/规则用祈使句 Don't push，简洁有力。 (3) 答案：D。 医生给建议用 You shouldn't work ... 语气委婉。 考点10：综合语用：安全规则情景判断 ◇ 基础题 (1) 答案：D。 游泳前应该先热身 warm up，这是课文中的核心安全规则。 (2) 答案：A。 在楼梯上应该靠右行走 keep to the right，保障安全。 (3) 答案：B。 跑步后应该慢走 walk slowly，不应该立刻坐下。 ▷ 提升题 (1) 答案：C。 腿受伤了应该去看医生 see a doctor，而不是继续运动。 (2) 答案：D。 教室里不应该奔跑 run，read/write/listen 都是课堂应该做的事。 (3) 答案：A。 游泳前应先热身 warm up，这是课文中的安全建议。 ★ 拓展题 (1) 答案：B。 PE 课上最全面的安全提示是热身+不推搡别人。 (2) 答案：C。 安全演讲应传达正确规则：听老师的话+靠右行走。 (3) 答案：D。 Safety First! 是单元核心口号，最适合安全海报标题。 — 第 页 — 学科网（北京）股份有限公司 $