根据下面内容，回答题：

　　Every country has its heroes. They may be soldiers or sports people, doctors or film stars. Weadmire them for their courage, their strength, their devotion to duty or their talent. Their exampleinspires us to live better, to work harder.

　　Terry Fox was a young student who loved life and who loved sports. When he was just 18 yearsold a terrible tragedy occurred : his right leg had to be cut off because of cancer. Such an experiencewould have destroyed a weaker person--but Terry Fox was a fighter. He refused to give up. Instead,while he was recovering from the operation, an idea slowly formed in his mind. He decided he wouldrun across Canada--in order to raise money for cancer research.

　　Slowly and carefully, he began to train. Every step was extremely painful, but he insisted,increasing the distance covered day by day. Sixteen months later, in the spring of 1980,he was readyfor the long journey across Canada--his Marathon of Hope. It was a time of inspiration and heart-breaking emotion. Through television, every home saw his distinctive style of rnnning a kind of half-hop and half-run. Thousands of people lined the route to encourage him and to wish him well.They also gave money to fight cancer. Then, on September 1st,1980, after 143 days and more than5,000 kilometers completed,everything came tragically to an end. Terry had to stop.,He lived on foranother nine months and died on June 28th,1981. He was almost 23.

　　48Terry Fox was a_________

　　A.studentB.movie starC.soldierD.Sportsman

　　参考答案：A

　　参考解析：

　　文中第二段第一句话“Terry Fox wasa young student...”给出了答案。

　　49What idea was gradually formed in Terry's mind during his recovering stage?

　　A.Earning money.B.Cutting off the other leg.C.Running across the country.D.Exercising hard.

　　参考答案：C

　　参考解析：

　　根据文中第二段最后两句“...anidea slowly formed...He decided he would run Terry Fox的做法是赞美的、钦佩的。

　　50Terry Fox ran his journey_________

　　A.with thousands of people supporting himB.without raising any moneyC.with few people watching him on TVD.with his teachers and classmates following him

　　...

　　参考答案：A

　　51The author's attitude to Terry Fox is_________

　　A.sympatheticB.jealousC.indifferentD.admiring

　　参考答案：C

　　根据下面内容，回答题：

　　Researchers have found that REM (rapid eye movement)sleep is important to human beings.This type of sleep generally occurs four or five times during one night of sleep lasting five minutes toforty minutes for each occurrence. The deeper a person's sleep becomes, the longer the periods ofrapid eye movement.

　　There are physical changes in the body to show that a person has changed from NREM (non-rapid eye movement)to REM sleep. Breathing becomes faster, the heart rate increases, and, as thename implies, the eyes begin to move quickly.

　　Accompanying these physical changes in the body there is a very important characteristic of

　　REM sleep. It is during REM sleep that a person dreams.

　　52According to the passage,how often does REM sleep occur in one night?

　　A.Once.B.Twice.C.Four or five times.D.Forty times.

　　参考答案：C

　　参考解析：

　　根据文中第一段第二句的提示，可知REM一晚上发生四到五次。

　　53The word "deeper" in Paragraph 1 is closest in meaning to _________

　　A.heavierB.louderC.strongerD.happier

　　参考答案：A

　　参考解析：

　　文中的deeper指“人睡得深，睡得沉”，可以用heavier代替。

　　54Which of the following shows that a person is NOT dreaming in his sleep?

　　A.His eyes begin to move.B.His breathing becomes faster.C.His heart rate increases.D.His eyes stop moving.

　　参考答案：D

　　参考解析：

　　根据文中第二段的提示，可知D项不是做梦的特征。

　　55Which of the following is the best title of the article?

　　A.REM SleepB.Two Types of SleepC.SleepersD.What Happens to Sleepers

　　参考答案：A

　　参考解析：

　　文章主要讲述了人们在睡眠时的REM阶段的情况。