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    精英家教网 > 高中英语 > 题目详情
    ------ Can I help you?
    -------- No, thank you. I __________ now.
    A．have been servedB．have servedC．am being servedD．am serving
    C
    考察时态语态。根据can I help you?可知，该对话发生在商店里，所以I和serve之间是被动关系，排除BD。因为前面有NO，所以我现在正在有人招待了。
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