从方框中的七个选项中选出五个合适的句子补全对话.

从方框中的七个选项中选出五个合适的句子补全对话.
A.Thanks,I will.
B.You only need to pay half the price.
C.That’s a good idea.
D.We’ll begin the classes on January 20.
E.Can I help you?
F.When do the classes begin?
G.How much do they cost?
A:Hello,the piano club.(46) _____
B :Yes,I'd like to know something about the piano classes.
A:OK.(47) _____ And we'll have the classes three times a week,for six weeks.
B:(48) _____
A:900 yuan.
B:How much should I pay if I become a club member?
A:(49) _____
B:Oh,I see.
A:And you should come to write down your name before the classes begin.
B:(50) _____