What’s he doing? HeTv.A. watchB. watchesC. watchingD. is watching .

问题补充：

What’s he doing? HeTv.

A. watch

B. watches

C. watching

D. is watching .

答案：

A. watch

B. watches

C. watching

(答案→)D. is watching .

解析：考察时态。句意：他正在做什么？根据上文，可知本题答语为现在进行时，其结构为主语+be doing sth，选项C缺少助动词，故选D