Unit 4 Topic 3 Section A 习题.doc

Unit 4 Amazing ScienceTopic 3 Section A习题一、单项选择( ) 1. -Can you tell _?-At 8:00tomorrow morning. A. when will we start B. when we started C. when to start D. where to start( ) 2._he _ with foreigners in English ?-Yes ,he dare. A. Dare; communicate B. Are; to communicate C. Does; dare communicate D. Is; dare communicate( ) 3.I think youd better _at English. A. hard work B. to work hard C. work hard D. working hard ( ) 4. No one can tell me _ next. A. what to do it B. how do it C. how to do D. what to do 二、根据短文内容和首字母的提示，把所缺单词完整地填写在短文后的横线上。 Victor likes basketball very much. He often stays out to play basketball with his friends and a 1 home very late. Yesterday he played for 4 hours and f 2 when he should go home. His father and mother felt m 3 about that. However, Victor thinks it is important to spend some time on his hobbies, which can help him relax and make his life colorful. He wishes that he could get his p 4 support. At last, they ask him not to give up his hobbies but not to influence his study, e 5 .1. _ 2. _ 3. _ 4 _ 5. _三、完形填空。 When people talk about air pollution, they usually think of outdoor air pollution. But do you know that air pollution also exists（存在）in homes,offices,hotels and other building? The air in your home can be 2 to 100 times more 1 than the air outdoors! In fact, some American doctors say that 50% of illnesses have 2 to do with polluted indoor air. Smoking and cooking, heating appliances（设备），building materials,paints,and furniture are the main 3 of indoor air pollution. Air pollution 4 our health in many ways. Young children and the old often suffer more from it. Indoor air pollution can 5 peoples eyes, noses and throats. Air pollution, 6 indoor and outdoor, can also cause lung cancer, heart disease, and even harm the brain! It is said that half a million young kids and women die each year in India 7 indoor air pollution. There are many ways to reduce（减少）indoor air pollution. For example, 8 the amount smoke and try to 9 your family members and relatives from smoking. Environment-friendly materials pollute 10 and work well.（ ）1.A.crowded B. friendly C. pleasant D. polluted（ ）2.A.something B. anything C. everything D. nothing（ ）3.A.reasons B. causes C. things D. behavior（ ）4.A.helps B. influences C. kills D. prevents（ ）5.A.open B. close C. harm D. clean（ ）6.A.both B. either C. all D. neither（ ）7.A.thanks to B. instead of C. with the help of D. because of（ ）8.A.let B. rise C. increase D. make（ ）9.A.stop B. change C. disturb D. destory（ ）1