2. 歷史書籍可以提高我對過去的了解。
2. History books can improve my knowledge of the past.
科目：初中英語 來源： 題型：
一、單項填空
() 1. He has been to Shanghai,has he?
A. ever B. already C. never D. yet
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科目：初中英語 來源： 題型：
二、詞形變化
1. —Shall we have dinner in the new . (France) restaurant this evening?
—Good idea!
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科目：初中英語 來源： 題型：
() 3. Reading history books our knowledge of the past.
A. helps improve B. helps improving
C. help to improve D. help improve
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科目：初中英語 來源： 題型：
五、閱讀理解
What is the first thing you want to do when you see someone yawn (打哈欠) ？You want to yawn,too!Yawn is contagious.
Scientists have found that all people yawn. Babies start to yawn even before they are born. The earliest yawn takes place when a baby is still inside its mother. When young children are about one year old,they start to yawn when they see others yawning. That’s why scientists (科學家) seem to think yawning is contagious.
It is no secret that yawning is contagious,but why do we yawn? Well,scientists are not really sure. Some think we yawn because we feel bored. Recently scientists studied two groups of student's between the ages of 17 and 19. One group watched music videos,and the other watched a boring color test. Scientists compared (對比) the numbers of their yawns and found that the color test group yawned more times than the video group.
Another reason about yawning has to dp with breathing (呼吸) .Some scientists believe that when we are bored or tired,we breathe more slowly. As our breathing slows down,we can not get rid of (除去) enough carbon dioxide (CO2) in our bodies. When there is too much carbon dioxide,our bodies will tell the brains to breathe deeply. The result is a big yawn.
In 2007,scientists suggested a new reason. They said that the reason people yawned was to cool down their brainwS. The^se scientists found that people who were warmer than others yawned more often.
Scientists are still trying to find out why yawning happens and why it is so contagious. But they are only sure that when one person yawns,almost everyone else nearby wants to yawn,too.
() 1. The underlined word “contagious” in Paragraph 1 means .
A. helpful to our health B. passing from one person to another
C. hard to understand D. getting into one trouble after another
() 2. According to the scientists,people start to yawn when they are .
A. born B. one year old
C. 17 or 19 years old D. inside their mothers
() 3. Which of the following are the possible reasons about yawning according to the passage?
a. People yawn because they are bored.
b. People yawn to catch others’ attention.
c. People yawn to cool down their brains.
d. People yawn to get rid of carbon dioxide.
A. abc B. bed C. ahd I) , acd
() 4. We can probably read this passage in a .
A. story book B. travel guidebook C. movie poster D. science magazine
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