请阅读下面图文，简要回答所给问题。
Air pollution in many cities has been more and more serious.Especially in winter，we see a lot of foggy days in North China.PM 2.5 in the air can harm human health.PM 2.5 refers to small particles(颗粒) which are 2.5 micrometers(微米) or less in diameter.
What's the cause of PM 2.5 pollution?
Daily average particulate pollution (PM 2.5)
The 10 worst Chinese cities
The cities in North China are facing a more serious situation than the other parts.For example，Shenzhen and Guilin in the south of China are regarded as smog－free cities.While some cities，like Xingtai，Shijiazhuang and Baoding are among the most polluted cities.
1.What does PM 2.5 refer to?
______________________________________
2.What causes the most pollution in Beijing according to the chart？What percent is it?
___________________________________
3.Are Shenzhen and Guilin smog cities?
___________________________________
4.Which Chinese city is polluted most seriously according to the chart?
___________________________________
5.What will you do to reduce air pollution?
___________________________________
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轻松课堂单元测试AB卷系列答案科目：初中英语 来源：人教版九年级英语上册Unit 1 How can we become good learners 单元测试卷 题型：完型填空
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I was glad to spend part of my time in this way and ______ the words under the funny pictures. The right words did not ______ come to our mind quickly, so we can use the pictures to help us. I am sure that it is a great way to make your child learn new words ______ looking at the pictures. I would provide this program ______ children and beginners to help them increase their vocabulary. Try this simple way to improve your memory.
1.A. paid B. cost C. spent D. took
2.A. look out B. look for C. look in D. look after
3.A. necessary B. important C. useless D. meaningful
4.A. eyes B. ears C. head D. hands
5.A. video B. recorder C. pictures D. dictionaries
6.A. website B. problem C. method D. thought
7.A. draw B. imagine C. write D. describe
8.A. never B. ever C. seldom D. always
9.A. through B. with C. by D. for
10.A. with B. for C. to D. from
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How ________Jack is！He hasn't fed the dog for two days.
A. cruel B. hard C. smart
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根据语篇内容，用方框中所给词的正确形式填空，使短文意思通顺、连贯。方框中有两个词为多余项。
prevent whether feel have brave until anybody value sound nothing land never
There was once a cave(洞穴) near a town.It was called “Cave of Fear”. 1. who entered it didn't return.It's said that there might be a monster in the cave.In order to 2. the monster from getting out of the cave，people often left gifts at the mouth of the cave，and these 3. things always disappeared soon.
One day，a young man came to the town.When he heard about the cave，he decided to enter the cave and found out 4.there was a monster.As he went deep into the cave，he heard some strange 5.．So he followed the sounds. Suddenly，he 6.something was pushing his back.He was pushed into a large cave.As he 7. in the cave，he got very surprised.There was a big party. A lot of people were 8.the party. They were all those people who had 9. returned to the town.
Then he was told that this was the idea of a leader in the town.The leader wanted to show that if someone wanted to make a change，he should be brave. So the leader created the story of the monster.Only 10.people could enjoy big parties in the cave.
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1.A. I B. My C. Your D. Me
2.A. from B. to C. not D. in
3.A. is B. are C. am D. be
4.A. a B. an C. good D. /
5.A. buses B. desks C. schoolbags D. pencils
6.A. in B. to C. from D. but
7.A. friend B. teacher C. student D. mum
8.A. these B. the C. an D. a
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