worries the public a lot the way the students are getting more and more stressed out.
A. That
B. It
C. As
D. What
网友回答
A. That
(答案→)B. It
C. As
D. What
解析：考查it做形式主语：句意学生现在越来越有压力的样子让公众很担心。这里的主语实际上是the way the students are getting more and more stressed out.因为主语太长，用it做形式主语，选B。