补全对话。

— Hi. You look excited. 1_____

— It is sth said that a singing contest will be held in our school soon.

     And I think it a good chance to exercise my singing talents.

— 2_____

— A pocket radio will be given as a reward to the first prize winner.

— Are you going to take part in it?

— Sure. 3_____

— Really? But I don't think you've practiced enough.

— I'm going to. I bet(打赌) I can get the first prize.

— 4_____ I think you need to have a music teacher help you.

— I don't think it necessary. 5_____

A. By the way,are they giving prizes?

B. people say I have a good voice.

C. I don't know what others say about it.

D. You can do a lot better next time.

E. It'll turn out fine If I practice a lot.

F. What's happening?

G. Don't be so sure.