i'm not sure yet.maybe he _____in shenzhen or zhuhai

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is
再问： why，was呢？？
再答：从前面的am知道是指现在不确定，正常情况下总是说不知道“他现在在珠海还是深圳”，已经到达表示“现在在”，而你问的表示"过去"应该用has arrived in
再问：那...........，我还是没明白，你说的意思是他现在的状态是..........？？（麻烦您了）
再答：是的，我意思是说“我现在不确定他在……还是在……”，说现在他所在的位置就是用一般现在时is，就像你想说你自己现在到了哪里你还是用I am ...

i'm not sure yet.maybe he _____in shenzhen or zhuhai ---Do you know _____?---I’m not sure.Maybe he is a businessm -_____is he going to get?-I’m not sure.Maybe a pilot He will come .I‘m not sure.A.may B.maybe C.may be D.possible I AM NOT SURE YET? Do you know -----?I'm not sure.maybe an artist. 南通模拟题）--I don't know ___.--I'm not sure .Maybe he is a busin I am not sure( )he will come or not Where is Jeff?——I'm not sure.M____ he is at home or he m____ I am not sure yet同义句四道英语选择,1.____ whether he will come or not.【D】A.I’m sure B.I’ I'm not sure