Question

Before 1900, many theories existed as to the cause of yellow fever(黄热病)．Some doctors were sure the disease was air-borne；others felt that it was spread from person to person．Dr．Carlos Finlay, a well-known Cuban doctor of that time，had long held the theory that it was caused by the bite of mosquito(蚊子)．But neither the public nor the doctors then accepted his idea．

    Despite this，Walter Reed, an American doctor sent to study yellow fever in Cuba，went to talk with Finlay．Reed，after reading a lot on the subject，had begun to think that Dr．Finlay might be right．Then Reed and his comrades set to work at once．Outside Havana，they set up a laboratory and began experiments to test the theory．The experiments were successful．Now we know：A period of about two weeks must pass before a mosquito，after feeding on a sick person，could infect(传染)another person; the sick person had to have yellow fever a certain number of days before the mosquito biting him was able to carry the disease．

1. Before 1900，many people didn't think yellow fever was spread___________.

A．by air

    B．by getting in touch with the patient

    C．by the bite of mosquitoes

D．by dirty water

2. What is true according to the passage?

A．Reed agreed with Finlay after his talk with him．

B. Reed proved the theory by reading a lot of articles．

C．Reed proved the theory in his American lab．

D．Reed scientifically proved the theory.

3. Who first realized the actual cause?

    A．The public．　　　　 B．Reed．

    C．Finlay．　　　　　　 D．Doctors．

4. A person comes down with yellow fever because he has been bitten_______．

   A．by a mosquito

   B．by a mosquito that has bitten the patient

   C．by an infected mosquito

   D. by a mosquito that has bitten the patient of some days

5. What is the possible title for the passage?

    A．Reed，an Outstanding Doctor

    B. Several Theories on Yellow Fever

    C．Fight Against Yellow Fever

    D．The Cause of Yellow Fever

 

Answer 1

答案：1C2D3C4D5D
解析：

1、根据第一段倒数第一、二句，Finlay认为有黄热病起因是由于蚊子的叮咬而传播，那时大部分人都不接受他的意见。 2、Reed曾和Finlay谈过，又读了有关这方面的很多书籍及文章，最后通过实验证实了Finlay的猜想。但实验不是在美国而是在Havana进行的。 3、注意题目中用的是realized而不是proved。 4、根据文中倒数第一、二句我们知道蚊子只有咬了已患病数天的人才有可能传播疾病的能力。因此只有D项最全面。 5、A项与B项只是文中提及的内容。C项太空泛，不及D项具体切文。