题目内容
The lost boys were last seen _______ by the riverside.
A. to play B. to be playing C. playing D. play
C
那个丢了的孩子最后一次被看到是在河边玩。See sb doing 看见某人正在干某事。
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题目内容
The lost boys were last seen _______ by the riverside.
A. to play B. to be playing C. playing D. play
C
那个丢了的孩子最后一次被看到是在河边玩。See sb doing 看见某人正在干某事。