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

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2.-What''swrongwithyourradio,MrsGress1.____isverydifficulttoplaythepianoverywellforthelittleboy.A.Tha

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
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

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
选D it 在这是形式主语,真正的主语是 to play the piano

A.That

D.It
it 指的是to play the piano very well

D. it做形式主语

____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

D