题目内容
Some researchers believe that there is no doubt ____ a cure for AIDS will befound. (2005广东)
A. which B. that C. what D. whether
B
no doubt后为同位语从句,that作为引导词,不充当句子成分
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题目内容
Some researchers believe that there is no doubt ____ a cure for AIDS will befound. (2005广东)
A. which B. that C. what D. whether
B
no doubt后为同位语从句,that作为引导词,不充当句子成分