The missing boy was last seen near the East Lake.A. playingB. playC. playedD. to play

问题补充：

The missing boy was last seen near the East Lake.

A. playing

B. play

C. played

D. to play

答案：

(答案→)A. playing

B. play

C. played

D. to play

解析：考查分词结构。See sb doing 看见某人正在做某事；本题是这一结构的被动语态。句意：那个失踪的小男孩最后被人看见在东湖边玩耍。