单选题 You ______ all those clothes! We have a washing machine to do that sort of thing.
A. needn't have washed B. shouldn't have washed
C. must not have washed D. can not have washed

【正确答案】 A
【答案解析】本题考查的是情态动词的应用。A本不需要；B本不应该。根据句意应选择A。must的意思是“禁止”，can的意思是“能够”。本句的意思是：“你本不必洗那些衣服!我们有洗衣机做那种事情。”