When it comes to having trouble falling asleep，people have their own special ways to solve it.Some depend on a glass of milk while others count sheep.Counting sheep is a mental （心理的） exercise used in some cultures to put you to sleep.But does counting sheep actually put a person to sleep？
   In fact，to answer the question，the researchers at Oxford University recently found some people who had trouble falling asleep and monitored （檢測(cè)）them as they tried one of three different ways.One of them was counting sheep.
   The study divided 41 insomniacs into three groups.One group was asked to imagine beautiful and peaceful scenes like waterfalls when trying to fall asleep.Another group was asked to simply go about their daily life.The last group was asked to count imaginary sheep.
   Researchers found that those in the first group fell asleep about 20 minutes faster than they did on other，non-experimental nights，while insomniacs who had to count sheep took longer than usual.Although there were no scientific studies to support it，the researchers have their own reasons.
   First，the researchers believed that the act of imagining a peaceful scene requires more mental energy than keeping counting sheep.When people spend too much energy on mental imagination，it may make them more tired，which can help to sleep faster.
   Another reason was that the peaceful scene way may have simply been easier to continue because it is more interesting than keeping counting sheep.
   Researchers also said that the act of counting sheep may also add to anxiety （焦慮） for some，making falling asleep that more difficult.Though the sample size of the study was actually small，the results certainly still call this common sleep way into question.

（1）What does the underlined word "them" refer to？

D

D

A．The sheep.
B．The results.
C．The researchers.
D．The people with insomniacs.
（2）How many reasons do scientists show that counting sheep may not help people fall asleep？

B

B

A．Two.
B．Three.
C．Four.
D．Five.
（3）What is the writer's attitude （態(tài)度） towards the way of counting sheep？

C

C

A．Supportive.
B．Agreeable.
C．Doubtful.
D．Uncaring
（4）Which of the following can be the best title for the passage？

D

D

A．How Can We Sleep Faster？
B．What Do Researchers Do to Help Us Sleep？
C．Do You Like Counting Sheep？
D．Does Counting Sheep Put a Person to Sleep？