2024年中考英语仁爱科普版一轮复习 九年级上册Unit 2 Topic 2 课件

Unit 2　Topic 2 We humans have lived on the earth for 35，000 years. During this period， we have achieved a lot of amazing things while we have 1.  　done　⁠（do） something bad. Trees are becoming fewer and fewer because people all over the world have cut down 2.  　millions　⁠（million） of trees. As a result， the earth is taken 3.  　away　⁠ when it rains or when the wind blows. Forests may become deserts. done millions away In big cities， too many cars and buses cause air pollution， which can make people have 4.  　health　⁠（health） problems. The land and the water have been polluted 5.  　by　⁠ factories. Because of this， many rivers and lakes are now dead， which makes the world 6.  　thirsty　⁠（thirsty）. health by thirsty Around the earth， there’s a special kind of oxygen 7.  　called　⁠（call） “ozone”（O3） that is important to the earth. However， air pollution is 8.  　destroying　⁠（destroy） it and making a very big hole in the ozone layer. Too much 9.  　harmful　⁠（harm） radiation which can cause cancer reaches the earth directly. Carbon dioxide （CO2） in the air has increased 10.  　a　⁠ lot to make the temperature rise. This is called “the greenhouse effect” which causes the level of the oceans to rise and the climate of the earth to change. All these problems are very serious， so it’s time for us to do something for our planet now. called destroying harmful a thirsty A. adj. 口渴的　　B. adj. 渴望的 ① A young man should be thirsty for knowledge.  　B　 ② I’m thirsty. May I drink some water？  　A　 B A 考点精练1 ⁠ ⁠ （　C　）1. （2023·龙东地区）We should avoid  　　　　⁠a noise in the library. A. make B. to make C. making C （　A　）2. — Does the colour red represent good things in Chinese culture？ — Yes. But writing one’s name in red is not good， and we usually  　　　　⁠it. A. avoid B. advise C. allow A 考点精讲1　avoid v. 防止；避免 How can we avoid a serious water shortage？ 我们如何才能避免严重的缺水呢？ （教材P41 Section D 1a） 　　avoid作动词，意为“防止，避免”，后接名词、代词或动名词作宾语。 We should avoid making any noise in the background. 我们应该避免在背景中制造