Unit 13 Section A-备战2021年中考英语一轮复习九年级全一册知识梳理(人教版)

Unit 13 We’re trying to save the earth! Section A 1. 常用短语 1.the bottom of... ...的底部 2.write to 给...写信 3. play a part in 参与... 4.water pollution 水污染 5.turn...into... 把...变成... 6.used to 过去常常 7.cut down 减少 8.instead of 代替；反而 9.start doing 开始做 10.keep...clean 保持...干净 11.make a difference 起作用；有影响 12.lead to 导致；通向（某地） 13.hear of 听说 14.cut off 切断 15.throw...into... 把...扔进.... 16.be harmful to 对...有害 17.no longer 不再 18.at the top of 在...顶部或顶端 19.the food chain 食物链 20.the number of... ...的数量 21.in the last...years 在过去的...年里 22.so far 到目前为止 23.be good for 对...有好处 24.take part in 参加 25.take action 采取行动 26.turn off 关掉 27.pay for 付费；付出代价 28. throw away 扔掉；抛弃 29.put sth. to good use 好好利用某物 30.pull...down 拆下；摧毁 31.upside down 上下颠倒；倒转 32.be made of 由...制造 33.set up 建立；开办 34.be known for 以...而出名 35. not only... but also... 不但...而且... 36.bring back 恢复；使想起；归还 2. 考点精练 考点一 Even the bottom of the river was full of... 甚至河底都堆满了... bottom词性________，意为________。名词/底部；最下部 由其构成的常用短语为at the bottom of _____________ 在...的底部 He fell to the bottom of the stairs. 他摔到了楼梯底下。 The answer is at the bottom of the page.答案就在这一页的下端。 考点二 Everyone in this town should play a part in cleaning it up! 这个镇上的每个人都应该参与清理河流！ play a part in意为___________，相当于___________，后跟名词、代词或动词－ing形式。参与...;在...方面起作用/play a role in He didn't play a part in the competition at all. 他根本就没参加这次比赛。 Did you play a part in fighting? 你参与打架了吗？ 【拓展】 短语 play a part in中，part前可加 important、active等形容词，表达“发挥重要作用”“积极参与”等。 Computers are playing an important part in our daily life. 电脑正在我们的日常生活中发挥着重要的作用。 All the students play an active part in the school activities. 所有的学生都积极参加学校的活动。 (湖北宜昌中考)－A study shows that good habits play a very important _______ in children's education. －I think so. A. sense B. part C. reason D. meaning 点拨：可用固定搭配法解答本题。固定短语 play a part in意为“在...中起作用”。故选B. 考点三 Well, to cut down air pollution, we should take the bus or subway inste