We have bought so much food now that Suzie won't be with us for dinner.(2012·江西)
A. may not
B. needn't
C. can't
D. mustn't
网友回答
A. may not
(答案→)B. needn't
C. can't
D. mustn't
解析：考查情态动词。句意：既然Suzie不和我们一起吃晚饭，那我们就没有必要买这么多食物。根据 “now that Suzie won't be with us for dinner”可知答案，needn't have done表示“本没有必要做某事而实际上却做了”。