If you ________ Beijing Duck，I'd like to treat you to a meal at a famous duck restaurant．

A.didn't try          B.don't try          C.haven't tried      D.hadn't tried

If you ________ Beijing Duck，I'd like to treat you to a meal at a famous duck restaurant．

1. A.
   didn't try
2. B.
   don't try
3. C.
   haven't tried
4. D.
   hadn't tried