(2007·宜昌中考题)The number of visitors invited to the exhibition ________ 50. But a number of uninvited visitors ________ e to it.A.were; hadB.was; hadC.were; hasD.was; has
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D解析解析：本题考查a number of和the number of作主语时的区别。a number of+n.作主语时，中心词是名词，谓语动词和名词的数一致；the number of+n.作主语时，number是主语，谓语动词与number的数一致。因此本题D为正确