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    精英家教网 > 高中英语 > 题目详情
    We had to be patient because it ________ some time ________ we got the full results.
    A．has been；sinceB．had been；until
    C．was；afterD．would be；before
    D
    解析　在“it＋be＋一段时间＋before/after/since＋从句”句型中，before从句中的动作经过一段时间后才会实现；after从句中的动作发生后已经过去了一段时间；since从句中的动作完成后到现在已经有一段时间了。结合题意可知，答案为D项。
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