i'm not sure that will pass the exam tomorrow 为什么不能说passes 不是一个宾语从句么?that 可以省掉吧

I'm not sure I'm not so sure about that...的中文翻译 This sure is light,because I'm not that strong! I'm not sure 快 I'm not sure yet. I'm not sure()( 至今) I'm not sure that's a good idea中that's 为什么带s I'm sure I am not wrong I'm just not sure that's the right move right now.翻译,right There is ____ that he may come ,but I'm not sure .(possible) i'm not sure ______ he is speaking at the meetingA that B who Cwhether Dwhat 用must,can't改句子I'm sure that he is a middle school teacher.I'm sure that she is not playing the piano. 有没有I’m not too sure? NOW, I'm not sure 什么意思 为什么没有I’m not too sure? I'm not sure of that ,And I think he is probably at home .此句中的that I'm sorry.I'm late today._______ be late next time.A.Be sure to notB.Be sure that you notC.Be sure not toD.Be sure that you didn't I'm not sure when I should go.同义句 I'm not sure when( )( ).