—We are planning to have a casual get-together this Saturday or Sunday. Are you coming?—.

问题补充：

—We are planning to have a casual get-together this Saturday or Sunday. Are you coming?

—. I’ve got rather a busy day this weekend.

A. I hope so

B. Sounds great

C. You’d better not

D. I’m afraid not

答案：

A. I hope so

B. Sounds great

C. You’d better not

(答案→)D. I’m afraid not

解析：考察交际用语。A我希望如此；B听起来很棒；C你最好不要这样；D恐怕不行；句义：—我们真正计划一个周六或者周日的简单聚会。你会来吗？—恐怕不行，这个周末我很忙。根据后半句话，可知D项的否定含义符合上下文。故D正确。