—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 full day this weekend.

A. I hope so

B. Sounds great

C. I’m afraid not

D. You’d better not

答案：

A. I hope so

B. Sounds great

(答案→)C. I’m afraid not

D. You’d better not

解析：考查交际用语。根据下文：本周末我安排的非常满。可见恐怕不能出席聚会。故选C。