more than 100 million references to the word“tuhao” on social media since early September．
A. It has been
B. There is
C. There have been
D. They are
网友回答
A. It has been
B. There is
(答案→)C. There have been
D. They are
解析：句意：九月份上旬以来，“土豪”一词在中国社交网络上出现了1亿多次。There be句型，表示有……，且根据时间状语since early September，故用现在完成时，选C。