Where this plan ______ is on the small amount of time it allows for possible del

游客2024-02-19  2

问题 Where this plan ______ is on the small amount of time it allows for possible delays.

选项 A、falls off
B、falls behind
C、falls back
D、falls down

答案 D

解析 fall down(on sth.)是口语用法,指“(在……方面)失败,未做到”,符合句意;fall off指“消减,减少”,后面不接宾语;fall behind一般和介词with连用,指“落于……之后,落后”;fall back on意为“求助于,依靠”。
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