No sooner ( )one task than she was asked to do another.a:she had finished b:had she finished

题目

No sooner ( )one task than she was asked to do another.a:she had finished b:had she finished
c:has she finished d:could she finish

答案

B
No sooner.than ."一...就..."
引导时间状语从句,主句用过去完成时,"than"后面的从句用一般过去时.
No sooner ...than...常放在句首,表示强调.这时主句要倒装.
例:No sooner had I reached home than it began to rain.
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