—_____ swim in the river?

— oh, no. Our teacher told us ____ here. It’s dangerous.

A. Why don’t; not swim     B. Why not;   not to swim

C. Why not; don’t swim           D. Why don’t;  don’t swim

______ swim in the lake. It’s dangerous (危险的).

      A. Not           B. No            C. Don’t              D. Doesn’t

______ swim in the lake. It’s dangerous (危险的).

1. A.
   Not
2. B.
   No
3. C.
   Don’t
4. D.
   Doesn’t