Do you often feel tired or hard to concentrate(集中精力) in class ? If your answers to this question  is yes,      小题1:     .  .Not getting enough sleep can lead to many kinds of problems.
New studies show that not only Chinese students suffers from lack(不足) of sleep，American students also have the same problem .   小题2:    Why are they so tired ? One big reason is the use of electronic products（电子产品）.
A recent survey finds out that 71% of American kids aged 8 to 18 have TVs in the rooms and  about 36% have computers in their rooms.   小题3:    , playing video games ,sending text messages to friends and watching TV before bedtime.
How to solve the problem ? Scientist advise “  小题4:   . ”Spending more time on sleep can help students stay healthy     小题5:  
根据以上内容，从下 * * 个选项中选择适当的句子还原到短文中，使短文完整与正确。将其标号在答题卡上涂黑。（每小题2分，共10分）

A. Some American primary school students are very tired and sometimes they even fall asleep in class. B. perhaps it means you need more sleep. C. It’s never too late to change bad sleep habits D. Many kids spend a lot of time surfuring the Internet , E. and do well at school.