1.___ is known to us all is that China is a developing count
1.___ is known to us all is that China is a developing country.A.Which B.what C.as D.
1.___ is known to us all is that China is a developing country.A.Which B.what C.as D.It2.___ is known to us that China is a developing country.A.Which B.As C.What D.1B 2D.1是表从,为什么不能用It?2是主从,为什么不用what?