中文谷Accordingtothecompanies'websites,thenumberofactiveQQus...
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问题详情：
According to the companies' websites, the number of active QQ users in China has reached 1 billion, while Qihoo 360 also claims _______ at least 300 million users before June 2010.
A. to have B. to have had C. having D. having had
【回答】
B
知识点：非谓语动词
题型：选择题
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