The effect of the medicine, ________ we had expected, was quite encouraging.

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问题 The effect of the medicine, ________ we had expected, was quite encouraging.

选项 A、which
B、that
C、as
D、what

答案C

解析根据句意，此处插入语用来修饰effect，应是“正如”之意，用A项构不成非限定性定语从句，缺少系动词，用B、D项构不成表达结构。只有 C项符合句意。

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专业英语四级

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