人教版英语九年级全册练习题：Unit 13 We’re trying to save the earthSection A(3a～3b).doc

1、第二课时Section A(3a3b)1cruelcruel作形容词，意为“残酷的；残忍的”。be cruel to意为“对很残忍”。如：We shouldnt be cruel to animals.我们不应该对动物残忍。2harmfulharmful作形容词，意为“有害的”，其名词形式是harm，意为“伤害；损害”。be harmful to意为“对有害”，相当于do harm to。如：Excessive drinking does harm to the body.过度饮酒对身体有害。【拓展】后缀ful构成的常用形容词：useuseful(有用的，有益的)helphelpful(有帮助

2、的，有益的)forgetforgetful(健忘的)carecareful(小心的，仔细的)painpainful(疼痛的)wonderwonderful(极好的)colorcolorful(彩色的；色彩艳丽的)thankthankful(感激的)beautybeautiful(美丽的)【注意】末尾字母为y的，先把y变成i，再加ful!3at the top ofat the top of意为“在顶部或顶端”，其对应短语是at the bottom of，意为“在底部/下部”。如：He worked his way to the top of his profession.他一步一步努力，终于

3、成为行业内的翘楚。There are tea leaves at the bottom of my cup.我的杯底有茶叶。4lawlaw作名词，意为“法律；法规”。常用短语：break the law犯法keep the law维护法制make a law制定法律obey the law遵守法律pass a law通过法律traffic law交通法5scientificscientific作形容词，意为“科学上的；科学的”。如：We all support his scientific research.我们都支持他的科学研究。【拓展】science n科学scientist n科学家,0

4、1基础过关.根据句意及汉语提示填写单词。1I think its cruel(残酷的) of them to shoot the animals.2With the development of industry(工业)，it will cause some pollution problems.3Reading in the sun is harmful(有害的) to your eyes.4The government has made some laws(法律) to protect the wild animals.5We should use some scientific(科学的)

5、 ways to solve the problem.用括号内所给单词的适当形式填空。6Hainan is in the southern(south) part of China.7We all support his scientific(science) research.8This is an endangered(danger) animal.We should try to save it.9Smoking is harmful(harm) to your health.You must give it up.10In fact，about 70 million sharks ar

6、e caught(catch) and traded every year.,02能力提升.阅读理解。(黄冈中考)Last week，Chicago became the first city in the US to join the “Lights Out Plan”People turned off the lights in the citys tallest buildings so that thousands of birds could get to their winter homes.Every year in autumn，some birds fly over Chic

7、ago on their way to the south and come back the next spring.Lights mean danger to birds.Birds find their way by looking at the stars in the sky.Lights in tall buildings are so bright that birds may mistake them as stars.This means they can not find the right way to go home.This month，about 300 types

8、 of birds are flying over Chicago to go back to the south to live through the cold winter.Birds fly to warmer places for a few reasons.Many birds cannot live in the cold，so they fly to warmer places.But there are other reasons，too.Birds need to look for food in the south.Another reason is that they

9、want to have baby birds.Many birds like to have their baby birds in the same “house” they lived in last year，so they fly back there.There are about 9，000 kinds of birds in the world，and about 600 kinds of birds migrateSome birds can fly a very long way.Sometimes they fly to other countries.We have f

10、ewer birds today because there are fewer places for birds.(D)11.Why did people in Chicago turn off the lights in the citys tallest buildings last week?ABecause people wanted to save money.BBecause people liked the dark night.CBecause people were afraid that birds would make much noise. DBecause peop

11、le were afraid that birds would lose their way.(A)12.What does the underlined word “migrate” mean in Chinese?A迁徙 B定居 C冬眠 D重生(C)13.Today we have fewer birds because _.Alots of birds are often illBpeople kill lots of birdsCthere are fewer places for birdsDother animals eat them(A)14.Which of the following statements is NOT true?AAll birds fly to warmer places every year.BSome birds have to fly to warmer places in autumn. CSome birds can fly a long way to other countries.DAbout 600 kinds of birds migrate in the world.