问题补充：
---We e going for a picnic next Sunday, and Id like you to join us.
---！I have to see my grandmother. She has been ill for two weeks.
A. What a pity
B. Good luck
C. That’s all right
D. Go ahead
答案：
(答案→)A. What a pity
B. Good luck
C. That’s all right
D. Go ahead
解析：
试题分析:考查情景交际。A 多遗憾啊，多可惜啊；B祝你好运！C 好吧；不客气；D 走在前面；开始做；从后面I have to see my grandmother判断，应该是去不了，所以A选项正确。句意：--下周我们要去野餐，我希望你也能加入到我们中。 --多遗憾啊！我得照顾奶奶。她已经病了两周了。
