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    【题目】______ you keep it a secret for the time being? It’s just between us.

    A. Must B. Can C. Should D. May

    【答案】B

    【解析】

    试题分析：考查情态动词。Must表示主观的命令、规定；can用于征求对方意见，向对方请求许可；should表达义务、职责等；may也可以向对方请求许可，但语气更为委婉。句意：你能永远将这件事当做秘密吗？这只是我们之间的事。根据句意可以判断， 故选B。

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