( ) 3.______ students in our class can surf the Internet often. Some of them have no computers.
A. Both
B. All
C. Not all
D. None of
3. C根据句意可知有些学生没有电脑。not all 意为"并不是所有的"，表示部分否定。故选C
题目来源：仁爱英语同步练习簿九年级上下册 > Topic 1 Pollution has caused too many problems.
名校课堂系列答案科目：初中英语 来源： 题型：
When the air in Beijing got " crazy bad"， as an American reporter described(描述)，one could hardly even see others across the street. During the 1_________,you can usual I make out (辨认出)the sun through the sky, but even at noon, the sun is just 2_________ a small white ball. Your clothes can get 3_________ after a day's walking. Clothes 4_________ like in an airport smoking waiting-room.
But it's not just Beijing. On Monday, in Zhejiang Province，south of Shanghai， 800 miles away，a factory was 5 _________fire，but the air pollution was 6_________ bad that for three hours no one noticed the smoke coming out of the factory. To our surprise, Beijing or a town in Zhejiang Province couldn't even 7 _________in China's top 10 cities of the worst air pollution. It's clear that air pollution has become one of China's biggest problems. 8_________ can hurt everyone. Something 9_________ be done to do with the bad air. The Chinese government has taken the first,step to admit(承认)that it is a 10_________ Beijing is able to make its air fresher, so people there can breathe a little easier soon.
( ) 1. A. day B. evening C. holiday D. week
( ) 2. A. on B. like C. for D. over
( ) 3. A. clean B. wet C. dry D. dirty
( ) 4. A. touch B. feel C. smell D. sound
( ) 5.A. on B. in C. at D.for
( ) 6. A. such B. too C. very D. so
( ) 7. A. arrive B. reach C. be D. get to
( ) 8. A. One B. It C. Ones D. They
( ) 9. A. may B. will C. would D. must
( ) 10. A. question B. beginning C. problem D. key
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科目：初中英语 来源： 题型：
3. The government is trying to c a better living environment for all of us.
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