Watching the online open courses of some famous European and American universities _______a new fashion among white collars in China over the past few months.
A.became
B.had bee
C.has bee
D.bees
网友回答
C解析本题考查时态。根据句中时间状语over the past few months在过去的几个月，故用现在完成时态。所以选择C项。