(2013·高考辽宁卷)Laura was away in Paris for over a week.When she got home，there was a pile of

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A. waited
B. to wait
C. waiting
D. was waiting
解析：选C。句意：劳拉去了巴黎一个多星期。当她到家时，有一堆邮件正等着她。分析句子结构可知，空格处用作后置定语修饰mail，因为mail与wait之间为主动关系，且wait的动作不是发生在将来，故不用不定式而用现在分词结构。D项若改为which/that was waiting也正确，这样可构成定语从句修饰mail，但是作为从句主语的关系代词不可省去。