1.It is neccessary that he ____ in time to attend the meeting.
问题描述：
1.It is neccessary that he ____ in time to attend the meeting.
A.might come B would come C came D come
2.It's already 5 o'clock now.Don't you think it's about time_____?
A.we are going home B we go home C we went home D we will go
答
1.D
it is neccessary that sb （should） do 这是一个典型的虚拟语气句式.其中should可以省略.
类似的还有It is important /necessary/ strange/ impossible/natural that等等,都是这种用法
2.C
这里也是虚拟语气,其句型是：It is (high / about) time that + 主语+ 动词的过去式（也可以用should do,但优先使用动词过去式.表示“是时候该做某事了”
如：
It is time that I went to pick up my daughter at school. 我该去学校接我的女儿了.
=It is high time I should go to pick up my daughter at school.