根据对话情景和内容，从对话后所给的选项中选出能填入每一空白处的最佳选项，并在答题卡上将该选项涂黑。选项中有两项为多余项。
A: Hi. You look excited.    
B: It is said that a singing contest will be held in our school soon. And I think it a good chance to exercise my singing talents.
A:     
B: A pocket radio will be given as a reward to the first prize winner.
A: Are you going to take part in it?
B: Sure.    
A: Really? But I don’t think you’ve practiced enough.
B: I’m going to. I bet I can get the first prize.
A:    . I think you need to have a music teacher to help you.
B: I don’t think it necessary.    

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.