2019年mpa考试英语真题——非谓语动词318

{01}The text is too difficult for the students ________
A.to be understood
B.understanding it
C.to understand
D.to understand it
解析：
本题选C。

{02}Suddenly he heard someone ________ gently on the window.
A.to knock
B.knocking
C.knocked
D.being knocked
解析：
本题选B。