Set ur alarm clock,and you won't oversleep.这里的and为什么不能用then代替?

Set ur alarm clock,and you won't oversleep.这里的and为什么不能用then代替? A: Did you set the alarm clock?B: No, I am off tomorrow.为什么用did you.? 用are you set the alarm clock? Didn't mother tell you _____ the alarm _____ 5 o'clock?A.set; forB.to set; atC.set;toD.to set; for选哪个?为什么? I've set the alarm clock _5:30填介词 I can't use this alarm clock.Could you tell me how to__the time?A.set upB.set offC.setD.set down go off 的同义词句子是：I'll set an alarm clock to go off a few minutes early and put the clock by the telephone. 9.He set the alarm clock for seven.(改一般意问句) he the alarm clock for seven? We will set off early tomorrow,please set the alarm clock（ ） five. set the alarm clock 当中,发完the 再读alarm总是很绕口请问set和 the可以连读吗,怎么连,the 和alarm可以连读吗,又怎么连~ How can I wake up so early?----Set the alarm clock,____you will make it.A but B or C and D so A:Did you set the alarm clock?B:No,I am off tomorrow.为什么用did you.而不用 do you. --you have set the alarm clock,why?--wouldn't you rather your child____early tommorrow morning?a,will get up b.got up alarm o'clock还是alarm clock? i set the alarm clock for 8:00.这里 为什么用for不用at.. set alarm clock ringing对了么?如果不对,应该怎么改? 改写I have set the alarm clock for seven.（句意不变） Cina overslept this morning because her alarm clock didn't set off 怎么翻译 I forget to set my alarm clock ,and I ____(睡过头)this morning