问题补充:
---What do you usually do when it is raining?
---I often TV.
A. are watching
B. watch
C. watches
D. watching
答案:
A. are watching
(答案→)B. watch
C. watches
D. watching
解析:句意:当下雨时,你通常做什么?——我常常看电视。结合语境可知下文描述的是反复性的动作,故用一般现在时态。主语I是单数第一人称,故谓语动词用原形,选B。