—Let’s have a party this Sunday.—. We’ll have a good time.A. You’re rightB. That sounds gr

—Let’s have a party this Sunday.
— . We’ll have a good time.
A. You’re right
B. That sounds great
C. That’s for sure
D. Come on

A. You’re right(答案→)B. That sounds greatC. That’s for sureD. Come on解析：You’re right你是对的；That sounds great那听起来不错；That’s for sure那是肯定的；Come on开始，来吧。句意：这个周日让我们举行一个聚会吧!——根据下文，我们会玩得很高兴。可知选B，最符合语境。

回答的不错