阅读下列短文，从每题所给出的(A、B、C、D)四个选项中选出最佳选项。

　　Up to 65％ of children don't get as much sleep as they should do, and this can make them nervous and slower at school, scientists say．

　　So how long should young people sleep each night? The answer is between eight and ten hours．If you don't get enough sleep at night, you'll have less energy the next day．

　　But the scientists say many children have missed out on 4, 500 hours of sleep by the time they are seven years old．They say that children miss sleep because they have TVs and computers in their rooms, and busy parents don't read to their younger children at night any more．The traditional “bedtime story” helps children to relax and fall asleep peacefully．Children with TVs and computers in their bedrooms were more likely to sleep badly, and to get less than eight hours’ sleep．Even losing one hour's sleep a night can mean that children do less well at school．

　　German scientists think that your brain(大脑)keeps working while you are asleep．To show that they were right, they gave two groups of people a problem to work out．One group went to sleep, and the other group stayed awake．The result? The people who slept worked out the answer more quickly．This showed that their brains had been trying to find the answer while the people were asleep．So, make sure you get enough sleep tonight, and you'll be at your best tonight, and you'll be at your best tomorrow!

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阅读下列短文，从每题所给的四个选项(A、B、C、D)中选出最佳选项。

　　Anna was excited about starting her first day in the new school．However, when she first walked past the students in the school, her excitement turned to fear, and then to loneliness(孤独)over the next few days．"Why didn't anyone say 'hi' to me or invite me to his or her lunch table? Is it because of my clothes or my hair? " she wondered．Almost every day during the first week, Anna stayed alone, thinking that there must have been something wrong with her or that nobody saw her at all!

　　What caused Anna's problem? The reason was that nobody knew her．Most people don't like talking with strangers(陌生人)．So it's your job to volunteer to make contact with people who you want to know．The easiest way to catch their attention is to notice them first．Make eye contact with them and smile at them．When you smile at them, you are doing your best to show your kindness to them, and they are sure to understand that you are saying, "Hey, how's everything going? " In this way, you are taking the first step towards the road to friendship．

　　When Anna realized this, she started talking to her classmates．Guess what happened? It really worked．She had made two friends by the end of the month．

　　In fact, saying “hi” or making friends with strangers is not hard．And the joy it brings you is really great．So try to open your heart to strangers!

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