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。