是been proved ,been proofed,been proven哪个形式.还是都不对
是been proved ,been proofed,been proven哪个形式.还是都不对
选哪个,请给出原因.A.proving B.proved C.was proved D.has been proved
Your report have been proved!
It has been proved that qats will.
it has proved or it has been proved
This method has been proven to be still effective.
people who是has been还是have been
是have been well还是 have been good啊
have been的been是分词还是过去
急 been open还是has been opened
have ever been 还是 have never been
have been还是have been being?