I found ______ difficult to learn English wellI found ______ difficult to learn English wellA.it B.that C.this D./A是形式主语,但为什么不能是B,宾语重句

问题描述:

I found ______ difficult to learn English well
I found ______ difficult to learn English well
A.it B.that C.this D./
A是形式主语,但为什么不能是B,宾语重句