Declining an invitation的同义词是哪一个？

Accepting an invitation.
B. Agreeing an invitation.
C. Refusing an invitation.

—I'd like to invite you to come to my birthday party. Would you like to join us?—Yes,.

A. I have no time.
B. I'd love to.
C. I'm so sorry.

下面哪些句子表达邀请？

A. What do you do?
B. What're you going to do tomorrow evening?
C. Would you like to go shopping with me tonight?
D. How would you like to join us?

Invitation letters and invitation cards的意思分别是“邀请卡”与“邀请信。”

A. 对
B. 错

May I（邀请）you to attend a hike to the Great Wall?