---We would appreciate it if you could stay for lunch.---Sorry, I . I have anoth
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---We would appreciate it if you could stay for lunch.
---Sorry, I ________. I have another appointment.
A.won't
B.shan't
C.can't
D.mustn't
试题答案
C
句意：--如果你能够留下来一起吃午餐，我们将不胜感激。--对不起，我不能留下来。我还有一个约会。根据问句中的if you could stay for lunch可知用can回答。