Why don’t you your teacher for help?A. askB. to askC. askingD. asks

问题补充：

Why don’t you your teacher for help?

A. ask

B. to ask

C. asking

D. asks

答案：

(答案→)A. ask

B. to ask

C. asking

D. asks

解析：根据句子中的don’t可知，后面应该跟动词原形，故用ask。Why don’t you+do=why not+do“你为什么不”。本句的意思是“你为什么不向老师寻求帮助呀？”所以本题选A。