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：Hello, this is Renmin Opera House.16． 
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!17．
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.18． 
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. 19．
A：At the gate at least half an hour before the show starts.
B： 20．
A：You’re welcome.
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.
 
试题分析：这是一篇电话对话。B想买今晚的钢琴音乐会的门票，打电话询问，A对其一一进行了解答。
16．C 根据B的回答Do you still have tickets for the piano concert tonight?，可知A问需要什么帮助。备选句子中，What can I do for you?符合句意，故选C。
17．A 根据A的回答At 7:30，可知B问的是时间。备选句子中，When will it start?符合句意，故选A。
18．B 根据B的问话Can I book one ticket now?想订一张票，可知备选句子You can book it on our website.符合文意，故选B。
19．E 根据A的回答At the gate at least half an hour before the show starts.，可知B问的是在哪里买票。备选句子中，Where can I get the ticket?符合句意，故选E。
20．F 根据A的回答You’re welcome.，可知B表示了感谢。备选句子中，Thank you for your help.符合句意，故选F。
点睛：完成对话，要求根据上下文填写合适的句子填空，使句意通顺、前后连贯。重在考查学生对所学语言的综合运用能力和对文段的理解判断能力。本题难度不大，只要把握好上下句的意思和关系，正确作答是不成问题的。