问题补充:
was often the case, Miss Wang was the first to arrive at the school in the morning .
A. Which
B. What
C. As
D. It
答案:
A. Which
B. What
(答案→)C. As
D. It
解析:考查非限制性定语从句:句意:情况经常是这样,王老师是早上第一个到学校的。这里用as引导非限制性定语从句,指代后面的句子,which也可以引导非限制性定语从句,但是which不能放在句首,选C。