C
be busy doing sth忙于做某事
中国选手忙于下一届的奥运会
选择题Chinese player is busy'----'for the next olympic Games.
选择题Chinese player is busy'----'for the next olympic Games.
A train B to train C training
A train B to train C training
英语人气:865 ℃时间:2019-08-20 13:26:33
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