根据对话内容，从方框中选择合适的选项补全对话。其中有两项是多余的。

Betty: This is a photo of the Blues Boys playing in a concert last month. They are really great.

Tom:  ?

Betty: Yes, they play really great music.  , and the boy in the front is the one who sings. And at the back is the boy who plays the drums.  .

Tom: What kind of music?

Betty: Well, if they are called the Blues Boys, and they get everyone dancing.

Tom:  .

Betty: You can play the guitar?

Tom: No, I can't. But I'd like to learn!

A. They are really loud B. On the left is the boy who plays the guitar C. I guess they play the blues D.Is this the band which is playing at the school dance E. When I am in a band, I want to play the guitar F. What are they doing G. That's great