Unit 5 同步课时训练 2025-2026学年沪教版英语八年级下册

Unit 5 Section 4 Extending and developing competencies 一、单词拼写：根据提示完成单词拼写 1.She carefully __________ (pack) three red-crowned crane eggs and __________ (take) them with her. 2.Later, a song __________ (write) in memory of Xiujuan. （被动语态） 3.Finally, she __________ (be) too tired to return to the shore. She __________ (lose) her life. 4.She __________ (continue) searching in the water for many hours. 5.She __________ (work) at the nature reserve and __________ (care for) cranes and other birds. 二、完成句子：根据句意提示完成句子 6.21岁时，她得到了一份在江苏盐城自然保护区的工作。 When she was 21, she __________ __________ a job at a nature reserve in Yancheng. 7.她一直照顾生病的鸟，直到它能再次飞翔。   She looked after the sick bird ________ it was strong enough to fly again. 8.五年前，她的父亲在当地的自然保护区照顾丹顶鹤。 Her father ________ red-crowned cranes at the local nature reserve five years ago. 9.她听到两只天鹅失踪后，立刻开始寻找。   ________ she heard that two swans were missing, she began searching for them. 10.徐秀娟17岁时开始帮助父亲。   ________ Xu Xiujuan was 17, she started helping her father. 三、阅读理解 Do you see anyone dress up like an animal? In England, people may see a "big bird" walking in the forest. It’s not a real bird, but a man named Matt Trevelyan. As a bird lover, Matt wears a Eurasian Curlew （白腰杓鹬） coat and walks 53 miles! Eurasian Curlews are big birds with long legs. In the UK, these birds often live in the west （西部） of Scotland, near the Atlantic Ocean. Sadly, they are now in danger. Farming and buildings are taking their homes. Animals like dogs and sheep eat their eggs and babies. So the number of curlews is smaller and smaller. Matt works in a nature park, and he knows the importance of helping the birds. He spends three days making the coat with bamboo and plastic. Then, he walks 53 miles in two days. What drives him to do that? This walk isn’t for fun. It helps more people care about curlews. Matt’s idea comes from a woman called Mary Colwell. In 2023, she walks about 500 miles to learn more about curlews and protect the birds. For Matt, his walk is his way of protecting the birds. His story tells us that even one person can make a difference in protecting animals. All of us can do something to help, too! 11.What do we know about Matt’s Eurasian Curlew coat? A．He buys it from a bird lover. B．He uses it to watch the curlews. C．He gets it from Mary Colwell. D．He wears it and walks in the forest. 12.Where can we find Eurasian Curlews in the UK? A．A B．B C．C D．D 13.What does the underlined word "drives" in Paragraph 3 mean? A．开车 B．驱赶 C．敲打 D．推动 14.What does the writer mainly want to tell us? A．People like to dress up as big birds in England. B．Curlews are in danger because there is no food. C．Everyone can use his own way to protect animals. D．It’s interesting for people to work in nature parks. 答案以及解析 1. packed took 【详解】句意：她小心翼翼地包好三个丹顶鹤蛋，带在身边。根据语境可知，句子描述的是已经发生的过去行为，因此要使用一般过去时，动词pack在句中作谓语，它的过去式为packed；由“and”可知，take与pack在句中作并列谓语，因此take也需用过去式took。 2.was written 【详解】句意：后来，一首歌曲被创作出来，以纪念秀娟。主语“a song”与动词“write”为被动关系，需用被动语态；“Later”描述过去发生的事件，应用一般过去时的被动语态；主语为单数，be动词用was，write的过去分词为written。 3. was lost 【详解】句意：最后，她太累了，无法回到岸上。她失去了生命。根据语境可知，句子描述过去发生的事，主语“she”对应的be动词的过去式为was；“失去了生命”是过去发生的动作，lose的过去式为lost。 4.continued 【详解】句意：她在水中继续搜寻了好几个小时。 考查动词时态。句中描述过去发生的动作，应用一般过去时，continue的过去式为continued。 5. worked cared for 【详解】句意：她在自然保护区工作，并且照顾丹顶鹤和其他鸟类。原句中描述过去发生的动作，需用work的过去式worked；原句中and连接并列谓语，时态需与前面一致，第二空需用care for的过去式cared for。 6. was offered 【详解】原句中“得到了一份工作”是关键词，考查被动语态。主语她与提供工作属于被动关系，“提供一份工作” 的英文表达是offered a job，时态为一般过去时，一般过去式的被动语态组成为be动词+动词过去分词，题中主语为she，be动词用was，offer的过去分词变化为直接加ed。 7.until/till 【详解】原句中“直到”是关键词，表示“直到……为止”的连词是until/till，用于引导时间状语从句，符合逻辑。 8.looked after 【详解】原句中“照顾”是关键词，“照顾”的常用短语为look after。本句时间状语为five years ago，句子用一般过去时，因此动词用过去式。 9.As soon as/When 【详解】原句中“……后，立刻”是关键词，As soon as表示“一……就……”，引导时间状语从句，强调动作的即时性，符合“立刻”的语境；When表示“当……时候”，也可引导时间状语从句，符合句子逻辑，引导词位于句首，首字母需大写。 10．When 【详解】原句中“……时”是关键词，表示“当……的时候”且引导时间状语从句，应用连词When，句首首字母大写。 11．D 12．B 13．D 14．C 【导语】本文介绍了英国鸟类爱好者Matt Trevelyan为了唤起人们对白腰杓鹬这一濒危物种的关注，身着特制的白腰杓鹬造型外套，完成了53英里徒步的故事。 11.细节理解题。根据文章第1段“Matt wears a Eurasian Curlew coat and walks 53 miles！”可知，他穿着白腰杓鹬外套在森林里行走。故选D。 12.推理判断题。根据文章第2段“In the UK, these birds often live in the west of Scotland, near the Atlantic Ocean.”可知，在英国，白腰杓鹬主要生活在苏格兰西部、大西洋沿岸地区。据此推断，地图上符合“英国本土西部、近海”这一位置的区域应为选项B所示位置。故选B。 13.词句猜测题。根据文章第3段“What drives him to do that? This walk isn’t for fun. It helps more people care about curlews.”可知，Matt的行为不是为了好玩，而是为了让更多人关注这种鸟。因此，“drives”在这里表示“促使、推动”的意思。故选D。 14.主旨大意题。文章通过Matt的个人故事，在结尾处点明主旨“His story tells us that even one person can make a difference...All of us can do something to help, too！”，即每个人都可以用自己的方式保护动物。故选C。 学科网（北京）股份有限公司 $ Unit 5 Section 2 Exploring and applying rules （Grammar） 一、单词拼写：根据提示完成单词拼写 1.It’s n________ for us to take some exercise after school. 2.A new hospital __________ (build) in our town now. （现在进行时被动语态） 3.Trees __________ (plant) on the hill every spring. （一般现在时） 4.The homework __________ (finish) already. （现在完成时被动语态） 5.The house __________ (build) last year. （一般过去时） 二、完成句子：根据句意提示完成句子 6.You help the blind people cross the street. You are very kind. ______________ very kind _______________ the blind people cross the street. 7.To take in carbon dioxide is the rainforest’s job.（改为同义句） ________ ________ the rainforest’s job ________ take in carbon dioxide. 8.他年龄够大能上学。 He is ________ ________ to go to school. =He is ________ old ________ he can go to school. 9.The apple is so high that I can’t reach it. = The apple is ________ high ________ _______ to reach. 10.He easily changes his mind. = _______ _______ ________ him to change his mind. 三、阅读理解 In the small seaside town of Pacific Grove, California, western monarch butterflies used to fill the air. Every late fall and winter, tens of thousands of them would fly there to rest. That’s why this town has a nickname— “Butterfly Town, U.S.A.” But now, western monarch butterflies are in great danger. In one week in December 2022, volunteers counted about 16,000 butterflies in Pacific Grove. But in a similar week in December 2025, there were only 107 butterflies. Pesticides （杀虫剂）, habitat loss and climate change are hurting them. Scientists say that if nothing changes, western monarchs may cease to exist by 2080. Luckily, people in Butterfly Town are taking action. Museum workers and volunteers count butterflies every week. The data （数据） helps scientists track changes in the monarch population （种群）. They also ask people to help by planting flowers and not using pesticides. “Monarchs are light as paper clips , but they can fly more than 160 kilometers in a day. All of us should protect these small but powerful creatures,” a museum worker said. 11.________ western monarch butterflies were found in Pacific Grove in December 2025. A．107 B．2,080 C．More than 160 D．About 16,000 12.The underlined words can be replaced by “________” in the passage. A．return B．rise C．disappear D．wake 13.What does the museum worker mean by saying monarch butterflies "light as paper clips"？ A．They are easy to catch and collect. B．They are small in size but strong in flying ability. C．They are often used in scientific experiments. D．They are very weak and cannot fly too far. 14.What is the main purpose of this passage? A．To describe the beauty of a seaside town. B．To explain how far monarch butterflies can fly. C．To encourage more people to go to visit Butterfly Town, U.S.A． D．To show the danger of monarch butterflies and human efforts to help. 答案以及解析 1.necessary/ecessary 【详解】句意：放学后做些运动对我们来说是必要的。根据语句 “It’s … for us to take some exercise after school.” 及首字母 “n” 的提示可知，此空的含义为 “必要的”，英文翻译为 “necessary”，形容词，It’s + 形容词 + for sb. to do sth. 是固定句型。 2.is being built 【详解】句意：现在我们镇上正在建一所新医院。“医院”是被建造的对象，因此必须用被动语态；结合时间状语“now”可知，应用现在进行时的被动语态，结构为“am/is/are+being+动词过去分词”。主语“A new hospital”为单数，be动词用is，动词build的过去分词为built。 3.are planted 【详解】句意：每年春天，山上都会种上树。树是被种植的，需用被动语态，every spring是一般现在时的标志词，一般现在时的被动语态为am/is/are+动词过去分词，主语Trees是复数，be动词用are，plant的过去分词为planted。 4.has been finished 【详解】句意：作业已经被完成了。 结构为 “have/has been + 动词过去分词”。主语The homework是不可数名词，助动词用has；动词finish的过去分词是finished；already是现在完成时的标志词，用于肯定句中。 5.was built 【详解】句意：这所房子是去年建造的。build“建造”，为动词。分析句子结构可知，句子主语“The house”与动词“build”之间是被动关系，表示房子被建造，所以要用被动语态，其结构是“be+过去分词”。又因为时间状语“last year”表明句子时态是一般过去时，主语“The house”是单数，所以be动词用was，build的过去分词是built。 6. It’s of you to help 【详解】句意：你帮助盲人过马路。你非常善良。将两句合并为一句，常用“It is + adj. + of sb. to do sth.”结构，其中形容词“kind”表示人的品质，介词用of，to后接动词原形help。 7. It is to 【详解】句意：吸收二氧化碳是雨林的工作。原句是动词不定式作主语，可改为It作形式主语的同义句，结构为It is +名词+to do sth. 8. old enough so that 【详解】原句中“年龄够大”是关键词，表示“足够……可以做某事”的结构是“形容词+enough+to do”，“年龄够大”可用old enough表达；该结构可以和“so + 形容词 + that + 结果状语从句”互换，意为“如此……以至于”，因此后两空分别填so和that，转换后句子语义和原句一致。 9. too for me 【详解】句意：这个苹果太高了，我够不到它。so+形容词/副词+that+句子，意为“如此……以至于……”，还可以用too+形容词/副词+（for sb）+to do sth来表达，意为“太……而不能……”，所以空缺处依次填too；for；me。 10. It’s easy for 【详解】句意：他很容易改变主意。这是同义句转换，使用句型“It’s + 形容词 + for sb. to do sth.”表示“某人做某事是……的”，此处形容词为easy。 11．A 12．C 13．B 14．D 【导语】本文介绍了美国加州太平洋格罗夫西部帝王蝶的生存现状，指出其数量锐减的原因，并说明了当地为保护帝王蝶所采取的行动，呼吁人们重视并保护这类濒危生物。 11.第一段明确提到“But in a similar week in December 2025, there were only 107 butterflies.”，直接表明2025年12月在太平洋格罗夫仅发现107只西部帝王蝶。 12.第二段提到“Scientists say that if nothing changes, western monarchs may cease to exist by 2080.”，结合前文“western monarch butterflies are in great danger”可知，划线短语cease to exist意为 “灭绝、不复存在”，与disappear意思一致。 13.第三段博物馆工作人员提到“Monarchs are light as paper clips, but they can fly more than 160 kilometers in a day.”，通过转折词but表明，帝王蝶虽如回形针般轻盈（体型小巧），却拥有极强的飞行能力。 14.文章第一段介绍西部帝王蝶数量锐减、濒临灭绝的现状，第二段分析其濒危的原因，第三段说明当地为保护帝王蝶所采取的行动，核心目的是展现帝王蝶的生存危机与人类的保护努力。 学科网（北京）股份有限公司 $ Unit 5 Section 1 Experiencing and understanding language 一、单词拼写：根据提示完成单词拼写 1.In the green school, there ________ (be) a river that flows through the playground. 2.The ________ （官方的） notice says that the school sports meeting will be put off till next Friday. 3.The number of wild tigers ________ (be) getting smaller now. 4.________ they raised their guns, they shot my mother. 5.Time waits for no man, but some people will never realise the _________（价值） of time until it’s gone. 二、完成句子：根据句意提示完成句子 I _______ _______ ________ the maths test tomorrow. 7.我过去常常踢足球。 I ________ ________ play football. 8.左边第二个人和我年龄差不多大。 The second person from the left is about ________ ________ ________ ________ me. 9.我的老师对我们的学习很严格，但也鼓励我们学会思考。 My teacher ________ ________ ________ our study but also ________ us to think. 10.为了保持健康，你应该每天做一些体育锻炼。 To ________ ________, you should do some physical exercise every day. 三、阅读理解 Hello, my name is Jane. Let me tell you about the best day of my life! I got up early and went to the kitchen in my pajamas （睡衣）. It was my thirteenth birthday and I was really happy and didn’t sleep all night because I kept thinking about all the presents I would get. I walked into the kitchen with a big smile on my face, but nobody looked at me. Mum and dad read their newspapers. My two elder brothers ate breakfast. Nobody said a word. They didn’t remember my birthday! It made me feel disappointed （失望的）. I turned around and walked out of the kitchen. Suddenly, I heard a noise. I went back to see what it was. I couldn’t believe my eyes. There were lots of presents on the kitchen table. When I turned around, I saw Mum, Dad and my brothers! Mum had a big cake with candles and they sang "Happy Birthday" to me. We had the cake and opened all the presents. They didn’t forget my birthday at all. It was the best day of my life! 11.Why did Jane get up so early? A．She had a good habit in the morning. B．She wanted to make some food for her family. C．She wanted to do some exercise to keep fit. D．She was looking forward to getting some birthday gifts. 12.How many people are there in Jane’s family? A．Three. B．Four. C．Five. D．Six. 13.How does Jane’s feelings change in the story? A．Disappointed-surprised-angry-happy. B．Excited-disappointed-surprised-happy. C．Sleepy-disappointed-surprised-sad. D．Lucky-surprised-disappointed-sad. 14.What can we infer （推断） from the passage? A．Everyone in Jane’s family loves her deeply. B．Jane often feels lonely. C．Jane’s family are very poor. D．Jane’s family forgot her birthday. 答案以及解析 1.encourages 【详解】句意：孙先生总是鼓励我要全力以赴。本句时态是一般现在时，主语“Mr Sun”是第三人称单数，动词用三单。故填encourages。 2．used 【详解】句意：我哥哥过去是一名工人，但现在是一名教师。used to do“过去常常做某事（现在不做了）”，强调过去与现在的对比。故填used。 3.bored 【详解】句意：在李老师的课堂上，我很少感到无聊，因为他很有趣。根据“I seldom feel...in Mr Li’s class because he is funny.”以及所给单词可知，此处表示在李老师的课堂上，我很少感到无聊。bored“无聊的”，形容词，作表语。故填bored。 4．(t)ips 【详解】句意：我的邻居是个善良的人。他经常给我们一些关于养花的建议。根据“My neighbor is a kind person.”并结合首字母提示可知，此处表示给我们一些关于养花的建议，tip“建议”，可数名词，结合some可知，要用其复数形式tips。故填（t）ips。 5.(s)mart 【详解】句意：李老师是一位聪明的老师，他经常用有趣的方式来教我们知识。根据“He often uses interesting ways to teach us knowledge.”结合首字母可知，是说李老师是一位聪明的老师，smart“聪明的”，形容词，在句中作定语。故填（s）mart。 6. am worried about 【详解】be worried about“担心”，时态是一般现在时，主语是I，be动词用am。故填am；worried；about。 7. used to 【详解】used to do sth“过去常常做某事”，固定短语，故填used；to。 8. the same age as 【详解】根据中英文对照可知，the same+名词+as“和……一样”，固定搭配；age“年龄”，名词。故填the；same；age；as。 9. is strict about encourages 【详解】根据中文提示，可知前三空表示“对某事严格”，可用be strict about sth表示；这句话是一般现在时，主语“My teacher”是第三人称单数，be动词用is；encourage sb to do sth意为“鼓励某人做某事”，此处动词也用三单形式。故填is；strict；about；encourages。 10. keep/stay healthy/fit 【详解】根据中英文对照可知，空格处应为“保持健康”keep/stay healthy/fit，此处为动词不定式作目的状语，故空格处应用动词原形。故填keep/stay；healthy/fit。 11．D 12．C 13．B 14．A 【导语】本文描述了Jane过生日当天，家人为她准备了惊喜。 11.细节理解题。根据“It was my thirteenth birthday and I was really happy. I didn’t sleep all night because I kept thinking about all the presents I would get.”可知，Jane整晚没睡，因为一直在想会收到的礼物。故选D。 12.细节理解题。根据“Mum and dad read their newspapers. My two elder brothers ate breakfast.”可知，家庭成员包括：Jane、父母、两个哥哥，总计5人。故选C。 13.细节理解题。根据“I was really happy… I kept thinking about all the presents”；“nobody said a word… It made me feel disappointed”；“I couldn’t believe my eyes”以及“It was the best day of my life！”可知，Jane的情绪变化为兴奋，然后失望，接着惊讶，最后感到高兴。故选B。 14.推理判断题。根据“There were lots of presents on the kitchen table.”以及“They didn’t forget my birthday at all.”可知，家人假装忘记生日，却准备了礼物、蛋糕和惊喜派对，这表明他们对Jane的爱和重视，故选A。 学科网（北京）股份有限公司 $ Unit 5 Section 3 Expressing and communicating ideas 一、单词拼写：根据提示完成单词拼写 1.If I can’t recite this poem, my teacher will ________ （惩罚） me by reading it 20 times. 2.He hurt his ________ （肩膀） while playing basketball. 3.I often share my travel stories and photos on my online ________ （博客） every weekend. 4.It is reported that the famous writer ________ (publish) three new books since last year. 5.They ________ (ought to) be honest in the competition. 二、完成句子：根据句意提示完成句子 6.自从那只大熊猫失踪后，搜救人员日夜寻找它。 Since the giant panda ________ ________, the rescuers have searched for it day and night. 7.中国云南省是亚洲象的栖息地。 Yunnan Province in China _________ Asian elephants. 8.她经常在博客上分享自己的学校生活。 She often shares her school life on her ________. 9.Many soldiers were dying because they didn’t get to hospital quickly enough. （对划线部分提问） ________ ________ many soldiers dying? 10.刘允许他的队友站在他的肩膀上。       Liu allowed his teammates to step on his ________. 三、阅读理解 It is 7:00 a.m. at the Siberian Tiger （东北虎） Park in China. The keepers are getting meat ready for the tigers’ breakfast. By 7:30 a.m., the tigers are awake and hungry. They walk around their space and make loud sounds. When they see the keepers, they come close, some even standing up to reach for their food. Li Ming, a tiger keeper, says, “They are strong and beautiful. I take care of them every day. I wash their cages, feed them, and watch how they act. Each tiger is different. They are very special to me.” Siberian tigers, are big cats with orange fur and black stripes. They are a symbol of power and nature. But now, they are in danger. Scientists think fewer than 600 wild Siberian tigers live in the world, mostly in Russia （俄罗斯） and China. About 200 more live in zoos. Why are they in danger? ● Less forest: People cut down trees for wood and farms, so tigers have less space. ● Illegal （非法的） Hunting: Some people kill tigers for their fur and bones. ● Not enough food: Tigers eat deer and small animals like rabbits, but these animals are also disappearing. ● Tigers do not have many babies. A mother tiger usually has 2 or 3 cubs （幼崽） every 2-3 years. Many cubs die young. Adult tigers need a lot of space to find food, but forests are getting smaller. At the Siberian Tiger Park, workers help tigers have babies and study them. Schools teach kids about tiger protection. The government and other groups are working hard to save these amazing animals. If we keep helping, maybe one day there will be more tigers in the wild again. 11.What time do the Siberian tigers at the park usually wake up? A．6:30 a.m. B．7:00 a.m. C．7:30 a.m. D．7:50 a.m. 12.How many Siberian tigers live in the wild? A．about 200 B．more than 600 C．fewer than 600 D．600 13.What does tiger keeper Li Ming do every day? A．Clean the tigers’ house carefully. B．Play with the tigers and keep them strong. C．Sell tigers’ bones to the hunters. D．Help the tigers give birth to fewer babies. 14.Which of the following is NOT a reason Siberian tigers are endangered? A．The forests are getting smaller. B．The hunters may kill them for money. C．Too many cubs are born every year. D．The food is not enough. 15.Which do you think is a good way to help Siberian tigers? A．Planting more trees to make new forests for tigers. B．Feeding more Siberian tigers in the zoo. C．Hunting deer and small animals for tigers. D．Cutting down more forests. 答案以及解析 1.punish 【详解】句意：如果我不能背诵这首诗，我的老师会罚我读20遍。will后接动词原形，“惩罚”对应的英文动词是punish。 2.shoulder/shoulders 【详解】句意：他打篮球时伤了肩膀。shoulder“肩膀”，复数形式为shoulders。句意为“他打篮球的时候伤到了肩膀”，可以是伤到一侧肩膀，用单数形式；也可以是伤到双侧肩膀或不特指具体一侧或双侧的泛指情况，用复数形式。 3．blog 【详解】句意：我经常每个周末在我的网络博客上分享我的旅行故事和照片。blog“博客”是名词，形容词性物主代词“my”后接名词，此处用单数形式。 4.has published 【详解】句意：据报道，这位著名作家自去年以来已经出版了三本新书。publish“出版”是动词，由“since last year”可知，句子时态为现在完成时，结构为“have/has+done”，主语the famous writer为第三人称单数，助动词用has，publish的过去分词是published。 5.ought to 【详解】句意：他们应当在比赛中保持诚实。ought to是情态动词短语，本身无人称和数的变化，此处用原形ought to。 6. went missing 【详解】原句中“失踪”是关键词，表示“失踪”的短语是go missing。 本句为since引导的时间状语从句，主句是现在完成时，从句需要用一般过去时，go的过去式为went。   7.is home to 【详解】原句中“是……的栖息地”是关键词，表示“是……的栖息地”的短语是be home to。句子陈述客观事实，用一般现在时，主语Yunnan Province是单数，因此be动词用is，故填is home to。 8．blog 【详解】根据中英文对照可知，空白处表示“博客”，使用可数名词blog，根据句意可知，用单数。故填blog。 9. Why were 【详解】句意：许多士兵因为没有及时赶到医院而奄奄一息。根据划线部分“because they didn’t get to hospital quickly enough”可知，应该用特殊疑问词why“为什么”进行提问，后面接一般疑问句，时态是过去进行时，所以把be动词“were”提到主语“many soldier”前，故填Why；were。 10.shoulders 【详解】根据中英文对照可知，此处缺少“肩膀”。空格前“his”是形容词性物主代词，后应接名词。“肩膀”对应的英文是“shoulder”，通常用复数形式“shoulders”，因为人有两只肩膀。 11．C 12．C 13．A 14．C 15．A 【导语】本文介绍了中国东北虎园里东北虎的日常，东北虎的外形特征，以及它们处于濒危状态的原因，同时说明了人们为保护东北虎所做的努力。 11.第一段指出东北虎通常醒来的时间：“By 7:30 a.m., the tigers are awake and hungry.”，说明公园里的东北虎通常在早上7:30醒来。 12.第三段说明野生东北虎的数量：“Scientists think fewer than 600 wild Siberian tigers live in the world, mostly in Russia （俄罗斯） and China.”，表明野生东北虎的数量不足600只。 13.第二段说明东北虎饲养员李明每天做的事：“Li Ming, a tiger keeper, says, ‘They are strong and beautiful. I take care of them every day. I wash their cages, feed them, and watch how they act’”，说明李明每天会仔细打扫老虎的笼子（即老虎的家）、喂它们并观察它们的行为。 14.文章“ Why are they in danger？”部分列举了东北虎濒危的原因，其中提到“A mother tiger usually has 2 or 3 cubs （幼崽） every 2-3 years.”，说明东北虎每年出生的幼崽并不多，由此可推断“每年出生太多幼崽”不是东北虎濒危的原因。 15.文章提到东北虎濒危的原因之一是“Less forest: People cut down trees for wood and farms, so tigers have less space.”，由此可推断，多植树为老虎开辟新的森林，是帮助东北虎的好方法。 学科网（北京）股份有限公司 $