1.I invited Tom and Ann to dinner,but______of them came.
A.both B.none C.either D.neither
2.When he was here last year,this house______.
A.was building B.has been built C.was being built D.was to built
把解题思路也说下,对了那里第2题怎么区分什么时候用was 什么时候用has啊,｛他都是被动语太｝