Did you sleep the day away on March 21? Well,you should have done because it was World Sleeping Day. This is the one day of the year when people around the world care about their sleep,and ask themselves a lot of questions about sleep.

Why do we need sleep? Nobody can give a perfect answer to it. However,tests have shown that lack (缺少) of sleep over about four weeks leads to a strong drop in body temperature,great weight loss and finally,sickness.

Different people need different amounts of sleep. Eight hours a night is considered the average (平均) amount of sleep. For teenagers,the least number of sleeping hours advised by doctors are: ten hours for primary school students,nine for junior highs and eight for senior highs.

Some people seem to get along just fine with very little sleep at night. Leading American scientist Thomas Edison said that sleep was a waste of time. He did,however take naps during the day. On the other hand,Albert Einstein,another great scientist,said he needed at least ten hours' sleep a night.

Here are some of the most useful suggestions for a good night's sleep: Go to bed at the same time; Don't exercise in the evening;Keep the bedroom dark and quiet;Drink a glass of milk before sleep;Stop looking at the watch while you can't sleep!

根據(jù)短文內(nèi)容回答下列問題。

46. What day is March 21 ?

                                                                   

47. What will happen to you if you are lack of sleep more than a month?

                                                                        

48. What's your least number of sleeping hours advised by doctors?

                                                                            

49. What does take naps mean in Chinese?

                                                                     

50. What's the last paragraph mainly about?

                                                                    


46. It's World Sleeping Day.

47. A strong drop in body temperature,great weight loss and finally,sickness.

48. Nine hours.

49. 小憩/休息(片刻)

50. It's about some of the most useful suggestions for a good night's sleep.

題目來源：長江作業(yè)本同步練習冊九年級英語下冊人教版 > 綜合測試題（七）

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