---What’s your sister doing now?She her homework.A. doesB. will doC. is doingD. was d

问题补充：

---What’s your sister doing now?

--- She her homework.

A. does

B. will do

C. is doing

D. was doing

答案：

A. does

B. will do

(答案→)C. is doing

D. was doing

解析：句意：你的姐姐现在在做什么？她正在做作业。句中有now，表示现在，句子要用现在进行时态，故选C