(单选题)20: Richard：You've given us a wonderful Chinese dinner， Mrs. Liu. Mrs. Liu：______
A: I'm glad you enjoyed it.
B: Oh，I'm afraid I didn't cook very well.
C: Come again when you are free.
D: It's not necessary for you to say so.
(责任编辑：admin)要这答案加QQ：800020900 或加微信：vq800020900 获取
