Mary: We're having a few people over for a dinner party Friday. We'd love to have you.

Tom: ______

A. Oh, I'd love to. But I’m afraid.

B. Oh, really! What time should I come?

C. No, I have to prepare for the exam.

D. Yes, though I have to take the exam.

［答案］B

【精析】Mary邀请Tom出席星期五的宴会。选项A（噢，我愿意，但我恐怕）表达不完全；选项B（噢，真的吗？那我几点钟来？）符合交际语境；选项C（不来，我要准备考试）、选项D（好，虽然我要参加考试）表达不够委婉，过于直接，而且一般不用yes跟no应答别人的陈述句。