1．—Tom, it is high time you ________ preparing for the final exam. There are only two weeks left.
—Thank you for reminding me.
A. start B. will start
C. would start D. started
答案与解析：D 考查虚拟语气。it is high time后面的从句要用虚拟语气，谓语动词用过去式。句意：——Tom，你该为期末考试做准备了，只剩下两周的时间了。——谢谢你提醒我。
2．—Did you attend the meeting?
—I ________ the news now if I ________ it.
A．would have known; had attended
B．would know; attend
C．would know; had attended
D．would have known; attended
答案与解析：C 句意：——你参加会议了吗？——要是我参加了的话，我现在就会知道那个消息了。本题是错综虚拟条件句。第一句的did暗示了下文的时间是过去时，对过去的虚拟应用if I had done something；答语中的主句是对现在情况的虚拟，故用would know。
