was obvious the manager was waiting for LiFang to leave.
A. It, that
B. This, that
C. That, what
D. What, that
网友回答
(答案→)A. It, that
B. This, that
C. That, what
D. What, that
解析：句意：显然，经理在等李芳离开。这句话中It是形式主语，真正的主语是由that引导的从句。It be+形容词+that…这里it是形式主语，that后是真正的主语从句， 故选A。