As is reported, it is 100 years ________Qinghua University was founded.

A．when        

B．before   

C．after        

D．since

As is reported, it won't take a long time ____ the 20th Golden Rooster and Hundred Flowers Film Festival falls in the Binhu New Area. Hefei.

A. since            B. when        C. before       D. that

As is reported, it is 100 years ________Qinghua University was founded.

A．when  B．before  C．after  D．since