We all know that going to bed early is good for us.But do you know when is the best time to go to bed？Scientists may have found the healthiest time to go to bed.They say a bedtime of between10 pm and 11 pm is the best because it makes the risk of heart problems smaller.Six years ago scientists collected information on the sleep habits of 80，000 people.They then watched the people's health for six years.Around 3000 people developed heart problems.They went to bed earlier or later than the"healthy"10 pm to 11 pm time.
One of the scientists said "The results of my research suggested that going to bed early or late may be more likely to influence the body clock and be bad for cardiovascular（心血管）health.It was healthier for our body to wake up to the morning light.The most dangerous time to go to bed is after midnight.It resets（重置）the body clock."He also said that we may have heart problems if our body clock is not reset rightly.
（1）If we want to be healthy，what time may be the best choice to go to bed？ CC
A．At half past eight.
B．At a quarter past eleven.
C．Between10 pm and 11 pm.
D．After midnight.
（2）Why did 3，000 of the people develop heart problems according to the passage？ CC
A．They went to bed at different times.
B．They didn't play enough sports to keep fit.
C．They went to bed earlier or later than the healthy time.
D．They slept for less than eight hours a night.
（3）What's the passage mainly about？ CC
A．Health and eating habits.
B．Health and exercise.
C．Health and bedtime.
D．Bedtime and characters.（性格）
【考點(diǎn)】說明文；衛(wèi)生與健康．
【答案】C；C；C
【解答】
【點(diǎn)評(píng)】
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發(fā)布：2024/4/20 14:35:0組卷：2引用：1難度：0.8
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