Question

As it reported, it is 100 years _____________ Tsinghua University was founded. A．when B．bef.

As it reported, it is 100 years _____________ Tsinghua University was founded. A．when B．before C．after D．since

Answer 1

D

试题分析:句意:根据报道，清华大学已经建校100年了。句中采用了since在现在完成时当中的一个固定结构，即It is+时间段+since+从句（从句需要用一般过去时）。 考点: 连词的用法。