He did his best to stay awake, but the performance was so boring that he just __

游客2023-09-05  19

问题 He did his best to stay awake, but the performance was so boring that he just ______ to sleep.

选项 A、dropped away
B、dropped out
C、dropped off
D、dropped down

答案 C

解析 短语辨析。本题四个选择项都有drop,很易混淆,drop away(一个一个地)离开,drop down卧倒,顺着 (河流、山坡等)向下移动,drop out掉落,掉出,drop off睡着,根据题意只能选C。
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