题目内容

9. It is already 12:30 now，but dad hasn，t come back. He          the traffic jam on his way home. (catch)

已经12点半了，爸爸还没有回。他一定是在回家的路上遇到了交通堵塞。

9. must have been / got caught in考查情态动词表推测的用法。本题为对已经发生的事情进行推测，因此用must have done。表示对当前行为、情况或;1夫态的4隹测，用must / may / might / could + do / be句型;表示对此时此刻正在进行的动作的推测，用must / may / might / could + be doing句型;表示对过去发生的事情的推测，用must / may / might / could + have done / been 句型。否定句中用can / could not(想必不会，不可能) 或may / might not(可能不) 表示否定推测。疑问句中用can / could...?表示"……可能吗？会是……吗？"。

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2. Had we not used an out-of-date train schedule, we         the train. (miss)

要不是用了一张过期的列车时刻表，我们就不会误了火车。

3.1 really want to know             that Gangnam style is so popular all over the world. (why)

我真的想知道为什么《江南style》如此风靡全世界。

(   ) 7. We must make sure that public facilities, like the restroom and the lift,are         

to disabled visitors.

A. sensitive    B. impressive    C. sensible    D. accessible

4. It was        from his family for a couple of years that he realized the importance of the love from his parents. (away)

直到他离开家几年，他才意识到父母对他的爱的重要性。

(   ) 2,1 don' t want any reward for my help;I gave it        out of friendship.

A. properly    B. purely    C. strictly    D. conversely

(   ) 9. Since citizens, opinions are so important to the government，its leaders should al?ways be        of what the citizens think when they make decisions.

A. tired    B. curious    C. interested    D. aware

(   ) 3. ―Don't you know your computer has been infected with viruses?

一Really? No wonder it hasn，t        as well as before. Can you help deal with them?

A. appeared    B. operated    C. managed    D. controlled

 

For well over a thousand years，smallpox was a disease that everyone feared. The disease killed

century. By the end of the eighteenth century，smallpox was responsible for about one in ten deaths around the world. Those who survived the disease were left with ugly scars on their skin.

It had long been well known among farmers that people who worked with cows seldom caught smallpox;instead,they often caught a similar but much milder disease called cowpox(牛痘) .A British doctor called Jenner was extremely interested in this，and so he studied cowpox. He believed that,by vaccinating (接种疫苗) people with the disease, he could protect them against the much worse disease smallpox. In 1796，he vaccinated a boy with cowpox and,two months later,with smallpox. The boy did not get smallpox. In the next two years, Jenner vaccinated several children in the same way，and none of them got the disease.

News of the success of Jenner' s work soon spread. Vaccination soon became a common method to protect people against other diseases caused by virus，such as rabies(狂犬病) ，and vaccines were sent across the world to the United States and India.

It took nearly two centuries to achieve Jenner ，s dream of getting free of smallpox from the

whole world. In 1967, the world Health Organization (WHO )  started a great vaccination program， and the last known case of smallpox was recorded in Somalia in 1977. The story of vaccinations does not end there, however. There are many other diseases that kill more and more people every year. Besides,many new diseases are being discovered. The challenge for medical researchers will,therefore，probably continue for several more centuries.

(   ) 4. Smallpox was so serious that        by the end of 18th century.

     A.   its death rate was up to ten percent

    B.   those who caught it were certain to die

    C.   one in ten people in the world died of smallpox

    D.   one in ten deaths in the world was caused by smallpox

(   ) 5. Edward Jenner discovered that vaccination with cowpox could         .

     A.  make smallpox much milder

    B.  stop people from getting smallpox

    C.  protect people against any disease

    D.  prevent people's scars after smallpox

(   ) 6. Which of the following statements is NOT true?

     A.  The first experiment with cowpox was made by a British doctor.

    B.  After 1977 smallpox disappeared around the world according to WHO.

      C. Vaccination had existed among ordinary fanners before being discovered.

    D.  Vaccination can be used to protect people in the world against not only smallpox. 

(   ) 7. The author of the passage thinks that             .

     A.   vaccinations bring many new problems

    B.   vaccinations end the spread of diseases

    C.   there is a long way to go to fight against diseases

    D.   there is a long way to go to discover new diseases

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