Some researchers believe that there is no doubt ____ a cure for AIDS will be found. A. which B. what...
2023-01-22 02:45:31 169次 2013届河北省高二上学期期中考试英语试题 单项填空 反馈错误 加入收藏 正确率 : 100%
题目内容：
Some researchers believe that there is no doubt ____ a cure for AIDS
will be found.
A. which B. what C.
that D. whether
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