______us earlier, ______your request to the full.

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问题 ______us earlier, ______your request to the full.

选项 A、You have contacted... we could comply with
B、Had you contacted...we could have complied with
C、You had contacted...could we have complied with
D、Have you contacted...we could comply with

答案B

解析 在if引导的表示虚拟的条件状语从句中,有时可以把含有助动词、情态动词、be或have的虚拟条件句中的连词if省去,而将had,should,were等词提到主语之前。本句表示的是与过去事实相反的情况,从句用过去完成时,主句用would/could/might/should+现在完成时,选B。
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