题目内容
He_______just before the concert started.
| A.dropped out | B.dropped away | C.dropped in | D.dropped up |
A
短语辨析。Drop out退学,脱离;drop away离开,逐渐减少;drop in 落入,逐渐进入;drop up不期来到。句意:就在音乐会开始前他退出了。故选A。
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