单选题 Speaker A: Listen. I've got some tickets for a great rock concert on Sunday night. Would you like to go?Speaker B: ______

A、 Great! But I wonder if you have one more ticket so that I can bring my sister along.
B、 All right. When will it start?
C、 Sunday? Gee, I'd love to, but it's my mom's birthday.
D、 Thanks ever so much.

【正确答案】 C

【答案解析】A方邀请B方去听音乐会，B方需作出接受或谢绝邀请的回答。A项后半部分不太得体，B项不符合这一情景下的交际惯例，D项未作答复。只有C项是这一情景下的恰当反应。