问题补充：
-Say, lets have a get-together sometime this week.
-Shall we make it Friday evening?
A. I don think so.
B. I can agree more
C. You can be serious!
D. I don agree with you.
答案：
A. I don think so.
(答案→)B. I can agree more
C. You can be serious!
D. I don agree with you.
解析：句意：让我们这个星期某个时间聚会一下吧。--,我们定在星期五的晚上怎么样？由答语，可知说话人是同意的，用I can agree more再同意不过了，A. I don think so.我不这么认为， C. You can be serious!你不是认真的吧。D. I don agree with you. 我不同意，都不符合句意。选B。
