16.---I’m going to Venice next week.

--- _____. Carnival will be held then. Have fun!

A. You’re crazy.          B. You’re lucky. 

C. You’d better not.       D. You never know.

17. ---Mary’s been offered a job in a university, but she doesn’t want to take it.

---_____? It’s a very good chance.

A. Guess what     B. So what     C. Who care     D. But why