A
Each year there are at least five million people around the world who develop serious flu (流感), and almost half a million deaths. When someone we know gets the flu virus, we expect them to be very careful not to pass it on to others. Doctors and nurses working with flu patients also need to protect themselves from the virus. But what is the best way to do this? This is the question that flu expert Professor Jonathan
Van-Tam at Nottingham University is trying to answer. He wants to find out how flu is transmitted, so that he can stop doctors and nurses getting sick.
Van-Tam explains their method, "There are 41 volunteers in my experiment. Some healthy volunteers are made to get flu first. When they show symptoms (症状 ) , other volunteers, usually called recipients(接受者), enter the house. Everyone lives together in the small space for four days. Some of the recipients wear face masks, and wash their hands every 15 minutes, but some have no protection. In this way we can study who catches the flu and which ways of transmitting flu are important. During the four days when they are in contact with the virus, and for the ten days after that, the flu recipients are checked regularly."
The experiment is not simple and it is very expensive. It is difficult to design correctly, and it is also difficult to plan and carry out. Just one study like this takes about 18 months to organize and needs hundreds of people working on it. But Van-Tam believes it is worth because the results will help to decide what type of protection is needed for people working in hospitals with large numbers of flu patients around the world. And perhaps it could reduce the number of deaths from flu each year.
21. Which word can replace the underlined word “transmitted" in paragraph l ?
A. solved B. passed C. formed D. stopped
22. What is the main purpose of this study?
A. to test the medicines for people who develop serious flu
B. to find the best way to protect doctors and nurses from the flu.
C. to reduce the number of people who die of flu
D. to find out who gets the flu easily
23. According to the text, which of the statements is true?
A. This type of study lasted 18 months.
B. The experiment is neither simple nor expensive.
C. Recipients were divided into at least 2 groups to perform the experiment.
D. Wearing masks was the best way to protect people from getting flu
【答案】21. B 22. B 23. C
【解析】
本文是一篇说明文。文章介绍了流感专家Jonathan为了验证流感如何传染，而进行了一项复杂的实验。尽管很难，但是Jonathan认为这项实验很值得。
【21题详解】
词义猜测题。第一段When someone we know gets the flu virus, we expect them to be very careful not to pass it on to others.已经提到了流感病毒的传染，第二段Van-Tam想找到流感病毒是如何传染的，这对医生和护士很重要，因此得出transmit意为“传递”。故选B。
【22题详解】
推理判断题。根据最后一段But Van-Tam believes it is worth because the results will help to decide what type of protection is needed for people working in hospitals with large numbers of flu patients around the world.可知，Van-Tam相信这项实验的结果将有助于决定在世界各地有大量流感患者的医院工作的人们需要何种类型的保护，故选B。
【23题详解】
推理判断题。根据第三段Some of the recipients wear face masks, and wash their hands every 15 minutes, but some have no protection.可知，recipients(接受者)分为两类：一些戴面具，每十五分钟洗一次手；一些没有任何保护措施。故选C。
