Why not your teacher for help when you can’t finish it by yourself?
A. ask,write
B. to ask,writing
C. ask,writing
D. asking,write
网友回答
A. ask,write
B. to ask,writing
(答案→)C. ask,writing
D. asking,write
解析：句意：当你不能独自写完它时，为什么不向你的老师请求帮助？固定句式why not do sth，为什么不做某事，表示用来提出某种建议等，注意not后面接动词原形，finish后面一般接名词或者动名词作宾语，不接不定式，故选C。