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Smallpox, a kind of disease, has now died   .

A. out    B. away    C. off     D. down

 

A

die out “灭绝,消失”。die away“渐息”;die down“平息”;die off “(花、草)枯死”。

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For well over a thousand years, smallpox was a disease that everyone feared. The disease killed much of the native population in South America when the Spanish arrived there in the early sixteenth 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.
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Recently the World Health Organization announced that the disease of smallpox(天花)had almost been wiped out in most parts of the world, thanks to widespread vaccination(种牛痘). Most people are vaccinated at least once in their lives and if they wish to travel from one country to another they must be able to prove that they have had a recent vaccination. In this way the disease has been prevented from spreading and today one seldom hears of it at all.

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