问题
选择题
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 become
C．has become
D．becomes
答案
答案：C
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。