She began to try to sit up, this showed us that the effects of the drug were wea

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问题 She began to try to sit up, this showed us that the effects of the drug were wearing off.

选项 A、which
B、when
C、what
D、that

答案 A

解析这句话的意思是：她开始试图坐起身来，这表明药力正在消退。此题考查的是非限制性定语从句。先行词是“she began to try to sit up”这一句话，所以用which来引导。答案为A。

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