1.It’s ____train ride to Shanhai.
two-day B.two days’ C.two days
2.After discussion,We______ Australia.
decided to B.decided on C.Decided
3.I go to work by bus every day.---- ________.
So is he B.So does he C.So he does
4.She began to play the piano last year.————______.
A.So I did.B.I did so.C.So was I.D.So did I
要说明为什么.