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    精英家教网 > 高中英语 > 题目详情

    Some researchers believe that there is no doubt___ a cure for AIDS will be found.
    A．whichB．thatC．whatD．whether
    B
    本题考查同位语从句的引导词。题意为：一些研究人员认为，人们一定会找到治疗艾滋病的方法的。Doubt后接同位语从句时，如用于肯定句中，要用whether引导；如用于否定句中则用that引导。
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