请说明原因,

题目

请说明原因,
1.Sorry,I am too busy now.If I __have/had__ time,I would certainly go for an outing with you.
2.Food supplies in the flood-stricken area _______.We must act immediately before there ' s none left.
A.have run out B.are running out C.have been run out D.are being run out

答案

第一题选 had.句意是：抱歉,我现在很忙.假如我有时间,我定会跟你出去.这句是虚拟语气,从句用过去时,主句用过去将来.再举个例子：If I were her,I would not go out with him.（如果我是她,我就不会跟他出去.[其中含...