I'm sure _________you said is true.A.what B.that C.which D.when这是不是定语从句?怎么没有先行词?

I'm sure. I'm not sure I’m sure about it. I'm sure we will. I'm not sure 快 I'm not sure yet. I'm sure win 翻译 I'm not sure()( 至今) I' m sure i can do I'm sure I am not wrong I'm sure of that意思 I'm sure they will come. I'm sure to do it myself 翻译：I'm sure you did I‘m sure you like it.翻译 如何提问 I'm sure we will. I’M sure后面跟什么 有没有I’m not too sure?