选择A：fall off：掉落
或者可以是：fall down from,from不可省略
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Be careful.Don’t （ ） the ladder.A.fall off B.fall down C.fell off D.fell down
Be careful.Don’t （ ） the ladder.A.fall off B.fall down C.fell off D.fell down
其他人气：553 ℃时间：2020-03-29 09:43:04
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