（2017•北京） If the new safety system _______ to use, the accident would never have happened.

题型：单选题题类：真题难易度：普通

2017年高考英语真题试卷（北京卷）含听力

If the new safety system _______ to use, the accident would never have happened.

A、had been put B、were put C、should be put D、would be put

举一反三

— Did you go crazy? You ______________yourself.

—If it ______ rain tomorrow, but actually the weather forecast has removed our worry.

—It's a pity. How I wish I ________ time to attend it.

相关试卷