Do you get enough sleep? With so much homework it's often difficult to get the rest you need. But you need to try， because sleep keeps you healthy and it stops you getting fat.
Recently， a group of US scientists did a study (調(diào)查) of kids aged between 8 and 13. The study found that if kids sleep for just one extra (額外的) hour each day, the chance of their getting fat is cut by about 30 percent .
Why? When people don't get enough sleep, they become tired. When they are tired, they don't exercise enough. Also， kids like snacks: If they are awake (醒著的) an extra hour or two each day，they have more time to eat snacks or other unhealthy foods.
So， how much sleep should you get? Scientists suggest 10 to 11 hours a night for kids aged 5 to 12. For older kids, eight to nine hours will do.
小題1:How many reasons are given why people might get fat without enough sleep?
A．3. B．2. C．1 D．None.
小題2:If you are under 10， how long do the scientists advice you to sleep?
A．10 to 11 hours. B．8 to 9 hours. C．8 to 13 hours.D．As long as possible.
小題3:Where was the study done by the scientists?
A. In China.        B In Britain.        C. In America.        D. In Japan.
小題4:What does" eight to nine hours will do" mean?
A. Eight to nine hours' sleep will be good and enough.      
B Eight to nine hours' sleep will be too long.
C. Eight to nine hours' sleep will help get fat.
D. Eight to nine hours' sleep will help eat snacks and unhealthy foods.
小題5:What does the passage talk about?
A. How to get long sleep. 
B How to keep fat.
C. Enough sleep makes people healthy and slim (苗條)   
D. Long sleep makes people healthy and slim.

小題1:B
小題2:A
小題3:C
小題4:A
小題5:C

試題分析：這篇文章主要講述了充足的睡眠會使人健康和苗條。美國調(diào)查發(fā)現(xiàn)睡眠不足會使人發(fā)胖并說明了原因，文章還告訴我們孩子的睡眠時長。
小題1:細(xì)節(jié)理解題。根據(jù)文章第三段可知沒有充足的睡眠會使人發(fā)胖有兩個原因：1）沒有充足的睡眠人們就會累鍛煉就少，就容易發(fā)胖；2)孩子醒著的時間多，他們吃零食和不健康食品的機(jī)會就多，就容易發(fā)胖。故選B。
小題2:細(xì)節(jié)理解題。根據(jù)最后一段Scientists suggest 10 to 11 hours a night for kids aged 5 to 12.可知科學(xué)家建議5到12歲的孩子每晚休息10到11個小時，故選A。
小題3:細(xì)節(jié)理解題。根據(jù)第二段第一行a group of US scientists did a study (調(diào)查) of kids aged between 8 and 13.可知是美國的科學(xué)家做的調(diào)查，故選C In America.在美國。
小題4:細(xì)節(jié)理解題。結(jié)合上句Scientists suggest 10 to 11 hours a night for kids aged 5 to 12.可知科學(xué)家建議5到12歲的孩子每晚休息10到11個小時，那么eight to nine hours will do.意思就是8到9個小時的睡眠就是好的和足夠的，故選A。
小題5:主旨大意題。結(jié)合全文可知文章主要談?wù)摿顺渥愕乃邥谷私】岛兔鐥l，故選C。
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