问题补充：
----We’re free today. How about going out for a picnic this afternoon?
----.
A. Good idea
B. Never mind
C. Good luck to you
D. You’re welcome
答案：
(答案→)A. Good idea
B. Never mind
C. Good luck to you
D. You’re welcome
解析：Good idea好主意;Never mind别介意,不要放在心上;Good luck to you祝你好运;You’re welcome不客气.句意:我们今天有空.今天下午去野餐怎么样?结合语境可知选A.
