Question

Why not ________ to the south of China?I decide ________ to Hainan Island this summer．

1. A.
   going; to go
2. B.
   go; going
3. C.
   go; to go
4. D.
   to go;to go

Answer 1

C
“Why not+动词原形”是一个固定的句型；decide后跟动词不定式作宾语。