问题
选择题
Some researchers believe that there is no doubt ______ a cure for AIDS will be found.[ ]
A. which
B. that
C. what
D. whether
答案
答案：B
搜题请搜索小程序“爱下问搜题”
Some researchers believe that there is no doubt ______ a cure for AIDS will be found.[ ]
A. which
B. that
C. what
D. whether
答案：B
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