题目内容
It is uncertain ___ side effects these weight-loss drugs will bring about, although hundreds of thousands of patients have taken it.
A.that | B.whether | C.how | D.what |
D
解析

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题目内容
It is uncertain ___ side effects these weight-loss drugs will bring about, although hundreds of thousands of patients have taken it.
A.that | B.whether | C.how | D.what |
D
解析