I'm certain David's told you his business troubles.

I'm certain David's told you his business troubles. I am certain David's told you his business troubles.___,it's 一道英语选择题题I am certain David's told you his business troubles. I'm certain Davel's told you his business troubles,_____it's i'm certain David has told u his business troubles._____,it' I’m certain David’s told you his business trouble. ________, That's ok .You needen't say sorry.I'm never think you told m With so much homework to do,David told his sisters _______ s I told you I'm busy what's certain is that i'm still alone. That's all ___ I told you I’m David市价