20.You look so tired tonight.It is time you _____.A.go to sleep B.went to sleep C.go to bed D.went to bed这道题为什么选D不选B?go to sleep和go to bed怎么区别 ,这里为什么一定要用go to bed呢?

-You look so tired today.-so I___A am B do you look so tired,come on ahd sit down,please. You look so tired .yes,I have been playing basketball 'you look so tired.'用'so do I.'还是'so am I.' Why do you look so tired why do you look so tired?A.to wake B.awake C.waking D.wakes you look so tired,it is high time you ___ (go) to bed有理由 You look so tired, what have you been doing?与you look so tired,what have you done?的差异You look so tired, what have you been doing?you look so tired,what have you done?请问这两句有什么不同?它们分别是什么时态?他们对应的 You look at tired today You look at tired today you look very tired ,so you'd better have a rest 请问look 不是联系动词吗 为什么可用very You look so tired!Why not stop （）（have）a rest? you look so tired,stop _(work)and_(have) a rest并讲解一下, you look so tired .take a s____ and have a rest填空! why do you always look so tired?这是定语从句吗? You look so tired,come on and sit down ,please.的意思 why do you look so tired?i()(work)on the file for a whole night how come you look so tired.come 是怎么回事和do 一样吗 How come you look so tired?里的come是怎么回事?对吗这句话?