Some scientists believe that ________ is no doubt ________ a cure for AIDS will be found.

A. it; thatB. it; whether

C. there; thatD. there; whether

C

【解析】

試題分析：考查固定句型。there is no doubt that 毫無疑問….句意：一些科學(xué)家認(rèn)為將來會找到治愈艾滋病的方法是毫無疑問的。故選C。

考點(diǎn)：考查固定句型。

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