The present question is many students consider it impossible is really possible if effort is made.
A. what; that
B. that ; that
C. that; what
D. what; what
网友回答
A. what; that
B. that ; that
(答案→)C. that; what
D. what; what
解析：考查名词性从句：句意：现在的问题是很多学生认为如果努力就可能的事情是不可能的。第一空that引导表语从句，that起连接作用，不做成分，第二空what引导的是宾语从句，it是形式宾语，在宾语从句中what做主语，选C。