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Some researchers believe that there is no doubt a cure for AIDS will be found. A

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Some researchers believe that there is no doubt a cure for AIDS will be found. A

Some researchers believe that there is no doubt ______ a cure for AIDS will be found.

  A. which     B. that         C. what          D. whether 

试题答案

B

解析:

主要测试同位语从句。结合平时的学习可知单词doubt后面的引导词:肯定句中用

whether或if;否定句中用that。因此答案已经明了。意思:一些研究人员相信治疗艾滋病的方法一定会找到的。例如:I have no doubt that he will come。我相信他会来的。