The boys were last seen near the West Lake.A. missing ; playB. missed; playedC. missed ;

问题补充：

The boys were last seen near the West Lake.

A. missing ; play

B. missed; played

C. missed ; to play

D. missing; playing

答案：

A. missing ; play

B. missed; played

C. missed ; to play

(答案→)D. missing; playing

解析：考查固定结构。See sb doing sth。看见某人正在做某事。用的被动语态。Missing失踪的。选D。