阅读下面对话，从方框内7个选项中选择5个恰当的句子完成此对话，并把答题卡上对应题目的答案标号除黑。

A. When will it start? B. You can book it on our website. C. What can I do for you? D. Enjoy yourself. E. Where can I get the ticket? F. Thank you for your help. G. It's wonderful.

A：Hello, this is Ren min Opera House.

B：Oh, hi. Do you still have tickets for the piano concert tonight?

A：One moment, please. Uh, yes, here are a few left.

B：That's great!

A：At 7:30.

B：How long will it last?

A：It will last about two hours.

B：Sounds great. Can I book(预定) one ticket now?

A：Yes.

B：Well, but how can I do it?

A：Just go to our website, fill in your information choose a seat and pay online.

B：Sounds easy.

A：At the gate at least half an hour before the show starts.

B：

A：You're welcome.