Can you in English?--Yes I can.A. singB. singingC. singsD. singed

问题补充：

Can you in English?--Yes, I can.

A. sing

B. singing

C. sings

D. singed

答案：

(答案→)A. sing

B. singing

C. sings

D. singed

解析：can是情态动词，后跟动词原形，故本题选A.