How do you usually sleep — barefoot (赤脚) or with socks on? Scientists have found that wearing socks to bed can help you fall asleep more quickly. Isn’t that amazing?

The temperature of your internal organs (内脏器官) is called your core body temperature (核心体温). During the day, your core body temperature stays around 37 degrees. Over the course of seven or eight hours of sleep, it drops by as much as 1.2 degrees. How does this happen? Well, when your brain decides that your internal organs should cool down, it will widen your blood vessels (血管). The warmer blood from your body’s core will then go to the rest of your body. In this way, your core body temperature gradually drops.

This process is important for falling asleep. In fact, the faster your body’s core cools down, the faster you will get to sleep. According to scientists, wearing socks can help widen your blood vessels. This, in turn, lowers your core body temperature and helps you fall asleep more quickly.

If you have trouble getting to sleep, why not give it a try? Take a warm foot bath before bed and put on your socks. You’ll probably fall asleep fifteen minutes faster than usual!

根据材料内容选择最佳答案。
【小题1】How does the writer lead into the topic?

A．By asking a question.	B．By giving an example.
C．By listing a fact.	D．By telling a joke.

【小题2】Which picture shows the change of your core body temperature during your sleep?

A．

B．

C．

D．

【小题3】What does the underlined word “This” mean in the third paragraph?

A．Wearing socks can make you hard to sleep.

B．Wearing socks can help widen your blood vessels.

C．Seven or eight hours of sleep is good for your health.

D．Taking a warm bath before going to bed.

【小题4】What’s the last paragraph mainly about?

A．Tips on how to fall asleep faster.	B．Different people’s sleep. problems.
C．The importance of going to bed early.	D．The trouble of wearing socks to sleep.

【小题5】In which part of a magazine can the text be found?

A．Sports.

B．Science and technology.

C．Health.

D．Education.