(      )3.A. I’m fifteen.                 B. On March 10th.               C. In 1997.

(      )4.A. What’s the matter?       B. That’s too bad.                C. I’m sorry to hear that.

(      )5.A. That’s a good idea.      B. Thank you.                      C. Sorry, I don’t know.

(      )6.A. Well done!                  B. Enjoy yourself!                C. Happy birthday!