but I'm not sure I can do...这话对么?但是我不敢肯定（不确定）我能做到

I'm not sure Jay__know the answer,but I'm not sure.A.maybe B.Jay__know the answer,but I'm not sure.A.maybe B.may be C.may D.must Tom _____ at hom ,but I'm not sure. i'm m___ you are right,but iam not sure. He be married,but I'm not sure. I'm not sure 快 I'm not sure yet. I'm not sure()( 至今) maybe.but I am not sure. I'm sure I am not wrong She ___ know the answer,but I'm not sure.A.maybe B.may be C.may D.must Jay__know the answer,but I'm not sure.A.maybe B.may be C.may D.must .She _____ know the answer,but I’m not sure.A.maybe B.may be C.may D.must 18.I___YOU LATER,BUT I'M NOT SURE YET.A:SEE B:CAN SEE C:AM SEEINGD:MAY SEE I've come to find someone,but I'm not sure ( ) is the one I want to find.A.whom B.whoever C.who D.whomever ——Can I use your MP3?A Yes,you will B Not at all C I'm sorry but I do D Sure,go ahead I said I love my freedom,but now I'm not sure I do.是不是有语法错误?中式英语吗? 有没有I’m not too sure?