---We're going for a picnic next Sunday, and I'd 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
网友回答
(答案→)A. What a pity
B. Good luck
C. That’s all right
D. Go ahead
解析：考查交际用语：A. What a pity真遗憾B. Good luck祝好运C. That’s all right没关系D. Go ahead请便，句意：--我们下个星期天要去野餐。--真遗憾，我得去看奶奶，她病了两个星期了。选A。