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单选题
No sooner __________stepped out of the hall than it began to rain.
A
had we
B
have we
C
did we
D
do we
答案解析
正确答案：A
解析：
参考解析:当表示否定意义的词"never, hardly, seldom, under no conditions, no sooner"等置于句首时要用部分倒装结构，即将谓语动词的助动词置于主语之前。以no sooner...than.../hardly...when.../scarcel ...when ”一...就...” 引起的从句中谓语若用一般过去时，主句谓语动词就用过去完成时，故选A。
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