They did not feel (at case) (after) their experiment (was proved) a (success).A、

游客2023-09-25 89

问题 They did not feel (at case) (after) their experiment (was proved) a (success).

选项 A、at case
B、after
C、was proved
D、success

答案 B

解析此句子中时间状语从句为固定搭配not．．．until，所以应把after改为until。

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