I used to spend much time TV at home.A. watchB. watchingC. to watchD. watches

问题补充：

I used to spend much time TV at home.

A. watch

B. watching

C. to watch

D. watches

答案：

A. watch

(答案→)B. watching

C. to watch

D. watches

解析：句意：我过去常常花费大量时间在家看电视。spend用于sb spend...on sth或者sb spend...in doing sth（in可以省略），spend的主语必须是人，可以指花费时间、也可以指花费金钱；本结构中动名词做介词的逻辑宾语，表示抽象动作，故选B。