Ⅰ. Complete the following dialogue.
Dialogue A
（A：Shop assistant，B：Customer）
A：Can I help you？
B：Yes. I bought a camera in your store and used it for some time，but now the camera doesn’t work properly，it’s not focusing at all！________________（我想你们给我换一个）.
A：Let me have a look. En…yes，it can’t work well！It’s a production problem，indeed！
B：In fact，I used it carefully and took care of it properly by the instruction book.
A：Eh，it gets a good protection. ________________（我能看一下收据吗）？
B：Here it is！
A：Oh，I am sorry！________________（它已经过了保修期）. We can’t provide the aftersales service for you！
B：Yes，it’s my fault！But you can look for the record of my expenditure in your computer！As a matter of fact，I’m the member of your store！________________（我是你们的老客户了，能不能享有点特权呢）？
A：Please wait a second！Yes，and you have a good credit expenditure in our store！So，hmm…we can give you a privilege that we will give a replacement for you！
B：Thanks for your good service and extra help！
A：It’s my pleasure！
Dialogue B
（A：Customer service representative，B：Mr.Wilson）
A：Hello，City Water Service，how may I help you today？
B：I’m calling concerning my water bill. ________________（我觉得你们上个月多收了我的钱）.
A：I’m sorry to hear that. Why do you think we charged you too much？
B：The bill is 20 tons of water more than last month.
A：I’m sorry to hear that. Let me ask you a few questions and then I’ll see what I can do.
B：OK. Thank you for your help.
A：Of course，________________（感谢您提醒我们注意这个问题）. Now，how much do you usually pay for your water usage？
B：I usually pay about $20 a month.