来自孙宗海的问题
Parentsoftentaketheirchildrentojoinsomeativitiestopreparethem--------theirfuture.A:atB:behindC：forD:with
Parentsoftentaketheirchildrentojoinsomeativitiestopreparethem--------theirfuture.
A:at
B:behind
C：for
D:with
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2020-04-02 01:08