Question

【题目】The missing boy was last seen ___ near the river.

A. playing B. to be playing

C. play D. to play

Answer 1

【答案】【A】

【解析】句子意思：有人发现那个失踪男孩正在河边玩。感官动词seen强调被人发现的男孩正在河边玩，当时的现场状况，因此用see sb. doing 句型。