---What you ?-I’m doing my homework.A. do; doB. are; doC. are; doingD. can; do

问题补充：

---What you ?

---I’m doing my homework.

A. do; do

B. are; do

C. are; doing

D. can; do

答案：

A. do; do

B. are; do

(答案→)C. are; doing

D. can; do

解析：本题回答语表示的意思为我正在做作业，是现在进行时的结构be+doing，故问句也要用此结构，故本题选C。