A、  B、  C、  A(A)自己没有买，是罗伊代买的，间接回答了提问。(B)该题询问未来的事情，不能用过去时态，所以错误。(C)利甩ticket容易联想到价格这一点设置陷阱。

Could you tell me how I can place an additional order?
(A)I can find another place.
(B)Please fill out this form first.
(C)Thank you for your help.

Did you buy the ticket for the Saturday night concert?
(A)Roy said he would.
(B)It was a fantastic concert.
(C)It’s twenty dollars each.