一道四级英语选择题...请高手帮答下.

问题描述:

一道四级英语选择题...请高手帮答下.
I don't know who_____the electronic wires again.It is the time that some measures_____to prevent it.
A.has stolen,were taken B.stole,were taken
C.has tolen,are taken D.stole,are taken
麻烦帮具体解释下为什么和这道题考的语法点是什么..

第一个空用现在完成时,表示事情对现在有影响,考时态的差别.
第二个空应该用虚拟语气,固定句型 It is the (high)time that.
选A
个人见解~o(∩_∩)o~