had she finished the poem the students began to ask her questions.

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问题 ______ had she finished the poem ______ the students began to ask her questions.

选项 A、As soon as...than
B、No sooner...than
C、As soon as...when
D、No sooner...when

答案B

解析 “no sooner...than...”是固定搭配，表示“刚......就......”，类似结构还有“hardly (scarcely)...when...”，故选B项。

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专业英语四级

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