How long did you spend TV last night?A. watchB. watchedC. to watchD. Watching

问题补充：

How long did you spend TV last night?

A. watch

B. watched

C. to watch

D. Watching

答案：

A. watch

B. watched

C. to watch

(答案→)D. Watching

解析：句意：你昨天晚上看电视看了多久？Spend time doing sth意为“做某事花了多少时间”；故选D。