单项选择题
A.Of course， I’d give you our lowest quotation B.I’m afraid you have to tell me how large your order is going to be C.It’s a general practice everywhere else
A.Could I get an estimate before placing an order B.What does the estimate include C.How many would you like to order
A.Do you know about business tax B.Can you give me a brief introduction about business tax C.What do you think about business tax