Why not your teacher for help when you can’t finish it by yourself?A. ask; writeB. to as

问题补充：

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

答案：

A. ask; write

B. to ask; writing

(答案→)C. ask; writing

D. asking; write

解析：考查固定搭配。Why not do sth.为什么不做某事；finish doing sth.做完某事。所以选C。