When I returned .I saw him on the bed.A. layingB. lyingC. layD. lie

问题补充：

When I returned .I saw him on the bed.

A. laying

B. lying

C. lay

D. lie

答案：

A. laying

(答案→)B. lying

C. lay

D. lie

解析：考查固定短语。 See sb doing sth 看见某人正在做某事。故选B。