问题
_____ swim in the river — oh, no. Our teacher told us ____ here. It’sdangerous.
A: Why don’t; not swim
B: Whynot; not to swim
C:Why not; don’tswim
D: Whydon’t; don’t swim
B: Whynot; not to swim
C:Why not; don’tswim
D: Whydon’t; don’t swim
正确答案是：
