2.-What's wrong with your radio ,Mrs Gress 1.____is very difficult to play the piano very well for the little boy.A.That B.This C.I D.It
问题描述：
2.-What's wrong with your radio ,Mrs Gress
1.____is very difficult to play the piano very well for the little boy.A.That B.This C.I D.It
答
D.It
it 指的是to play the piano very well
答
D
答
____is very difficult to play the piano very well for the little boy.
A.That B.This C.I D.It
选D
I作主语,be动词用am,所以不选C
剩下的A,B和D貌似都对,但应选C
因为It is+ adj.+ to do sth. (it做形式主语) 是一个固定句型
答
A.That
答
选D it 在这是形式主语,真正的主语是 to play the piano
答
D. it做形式主语