they are not sure why this is happening

If you are not sure if the computer is right,why not_____? They are busy _ this week.They _ very tired.Why not _ a rest This Is Really Happening 歌词 it is not difficult to explain why they are so interested in 英语病句修改The reasom why they are against is that not only did w 英语翻译This is why i'm not convinced your revenue forecasts are why are you wearing a coat?it is not very suitable for this 英语翻译Why are you so sure that it is a 改正句子：1.These are you pens? No,they are not. 2.Is this your f 这些英语题怎么做好1.P___ he is right.I'm not sure of it 2.They are su they are very tired.why [don't they,not they,do they,not to] we are not sure.