________ that a good student like him should have made such a big mistake.

________ that a good student like him should have made such a big mistake.

A.It's strangely

B.It's surprised

C.It's understood

D.It's surprising

答案及解析： D

解析：

导解：it为形式主语，代表that引起的主语从句，surprising为形容词作表语．若选B，C则意义不通．