—It’s a fine day today. Shall we go swimming?— But we need to be home before six o’clock.A

问题补充：

—It’s a fine day today. Shall we go swimming?

— But we need to be home before six o’clock.

A. Have a nice time!

B. Not at all.

C. You are right.

D. Good idea!

答案：

A. Have a nice time!

B. Not at all.

C. You are right.

(答案→)D. Good idea!

解析： 考查交际用语。Have a nice time!祝你玩得高兴；Not at all.不客气；You are right.你是对的；Good idea!好主意。句意：今天天气很好。我们去游泳怎么样？好主意。但是我们需要在6点前回家。所以选D。