We ______ our breakfast when an old man came to the door.

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问题 We ______ our breakfast when an old man came to the door.

选项 A、just have had
B、have just had
C、just had
D、had just had

答案D

解析题型语法题。由于时间状语从句使用了过去时，我们就可肯定主句也只能使用过去的时态，故A和B错误。根据句意，尤其是根据句中just，我们就可推断出，从句动作发生在主句动作之后，所以主句动作要用完成体，when在这里作“在……之前”讲，相当于before。

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专业英语四级

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