Accordingtothecompanies'websites,th

发布时间：2020-07-26 21:25:03

According to the panies' 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 haveB.to have hadC.havingD.having had

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B
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