题目内容：

    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.