l am not sure Tom will come here tomorrow________he comes he

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l am not sure Tom will come here tomorrow________he comes here,l'll email you.
A whether;If B if ;Whether C.if If D.A&C

D.第一个blank应该是在sure 和tom 之间吧?那里用if、whether都可以.
后头那个是条件状语从句,主将从现,所以用if

l am not sure Tom will come here tomorrow________he comes he I am not sure _____ he will come here o l am not quite sure about it.Maybe he will come,and maybe he I am not sure( )he will come or not I am not sure --he will come back . OK .I am sure he will come i am not sure-----her sister will come here or stay at home --Is Mr.Brown driving here?--I am not sure.He ____ come by a Maybe Tom will come with us ,but he is not sure.同义句 Maybe Tom will come with us,but he is not sure同义句改同意句,``、.Perhaps Tom will come with us,but he is not sure.改同 I am not sure if Tom ____ home.If he ___,I will call you.