Question

    What time of day do you feel most alert(清醒的)? Are you more of a morning person? Or does your brain need a few hours to get going? A lot of research suggests that we should pay attention to our body clock. It can tell us what time of day we are best able to perform, according to the Wall Street Journal.

When it comes to the human brain, many people work best later in the morning. This is because the body’s temperature takes time to rise through the day. Taking a warm shower when you wake up can help speed this up.

But everyone’s body clock is different. Morning people will rise early and work better early in the day. Evening people will wake later but their brain will work better toward the end of the day.

Research show that we’re better at some activities at certain times of the day. Physical performance is at its best between 3pm and 6pm, so it’s better to exercise later in the day.

Between noon and 4 pm, people begin to get distracted (思想不集中的). This is partly because our brain becomes less alert after we eat a big meal. Research also shows that we become sleepy around 2 pm.

Finally, it is best to eat during our active periods. This allows our body to burn calories better and stops our blood sugar levels from getting too high.

1.Many people perform best later in the morning because________.

A.they can’t get up very early. B.they have to take a shower first.

C.the body’s temperature needs time to rise. D.that’s when the brain wakes up.

2.Evening people had better _________.

A.rise early and work in the morning. B.wake later and work better in the evening.

C.rise late and work in the morning D.wake later and work after midnight.

3.According to the research, which of the following is TRUE?

A.It’s better to do exercise in the afternoon. B.We perform better after eating a big meal.

C.Sleeping at 2 pm is not good for our health. D.Our body burns calories better at night.

4.What would be the best title for the story?

A.Research about time. B.The best time to do things.

C.Brain performance. D.Different periods of a day.

Answer

1.C

2.B

3.A

4.B

【解析】

本文是一篇说明文。文章主要介绍人体生物钟能够显示出人一天当中什么时候表现最好，不同的人有不同的生物钟，人们在不同的时间段身体活动能力也不一样。

1.细节理解题。根据第二段“many people work best … takes time to rise through the day”可知，有些人在早上后半段表现更好，那是因为需要时间来升高体温。故选C。

2.细节理解题。根据“Evening people will… toward the end of the day. ”可知，习惯夜晚生物钟的人起得迟，大脑在一天结束时更活跃。故选B。

3.细节理解题。根据“Physical performance …exercise later in the day.”可知，锻炼身体最好在下午3到6点，A正确；根据“our brain becomes less alert after we eat a big meal”可知，吃完饭之后大脑警觉性下降，B错误；根据“Research also shows that we become sleepy around 2 pm.”可知，下午两点我们会变得昏昏欲睡，并没有说是否适合睡觉，C错误；根据最后一段“it is best to eat… from getting too high.”可知，在身体活跃时期吃东西有助于燃烧卡路里，D错误。故选A。

4.主旨大意题。本文主要介绍生物种对我们人体哪些活动有影响，根据生物钟，我们能够更好掌握一天之中什么时候最适合做什么事，所以B正确。故选B。