I’m not sure what time he will _______ .A arrive B get to C arrive at D reach 应选什么,为什么

I'm not sure I'm not sure what's playing, I hedged. I'm not sure what I should expect.（改为同义句） I‘m not sure what ____ ____. I'm not sure what I should expect（改为简单句） I'm not sure ___ ___ expect I'm not sure what to expect(同义句）I'm not sure ______ ______ _____ ______ I'm not sure 快 I'm not sure yet. I'm not sure()( 至今) I'm not sure what I'm in a mood for?是啥意思 I'm not sure what I should do next 求这句话的同义句改为I'm not sure what __ __ next,一空一词! I'M not sure what I shuold do.改同意句.I'M not sure what I shuold do.【改同义句】I'M not sure ____ _____ _____. I am not sure what your talking I'm not sure what I should do改为同义句? not,i'm,sure,i,what,do,should连词成句 what the meaning ofI'm not sure I am up for this I'm sure I am not wrong 同义句转换：I'm not sure what I can buy for my mother..I'm not sure ---- ---- ---- for my mother. I'm not sure what I can buy for my mother.I'm not sure _______ _______ _______ for my mother.怎么同义句转换啊.