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【题目】There’s no doubt ______ hard work is the key to _____ your result.

A. whether; improving B. that; improving

C. whether; improve D. that; improve

【答案】B

【解析】

考查固定句式和固定搭配。句意:毫无疑问,努力工作是提高成绩的关键。固定句式:There’s no doubt that---“毫无疑问”; the key to doing sth.“做某事的关键。故选B。

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