1.It is politely requested by the hotel management that radios________after 11 o’clock at night. a.were not played b.not be played c.not to play d.did not play 2.______right now, she would get there on sunday. a.Would she leave b.If she leaves c.Were she to leave d.If she had left 3.It’s already 5 o’clock now.Don’t you think it’s about time_____? a.we are gong home b.wo go home c.we went home d.wo can go home 1.Had he worked harder,he______the exams a.must have got through b.would have got through c.would get through d.could get through 2.The mad man was put in the soft-padded cell lest he ______ himself. a.injure b.had injured c.injured d.would injure 3.We are all for your proposal that hte discussion_____. a.be put off b.was put off c.should put off d.is to put off 1.b request所引导的从句要用虚拟语气，should v 这里要用被动，should 省略。 2.c 主句表明是虚拟语气，从句要用were to 或should V ,省略if 时were或should 置于句首倒装。 3.c it is about time .........的结构也是虚拟语气的一种，表示建议，命令的语气，谓语动词应该用一般过去时。
1.b if 引导的状语从句，虚拟语气结构：主句 would have 过去分词，从句 用过去完成式。这句句子里从句使用了倒装。 2.a lest引导的状语从句要用虚拟语气，从句用should V的结构，should可以省略。 3.c proposal 引导的从句要用虚拟语气，这里是同位语从句，should V,这里要被动。