求解英语填空题He won't be getting in till about 10:30,_____?A.isn't

求解英语填空题
He won't be getting in till about 10:30,_____?
A.isn't he B.is he C.will he
I think i'm experted to pick him up,_____?
A.aren't I B.don't I C.are you
Nobody else has been tole he's coming,_____?
A.is he B.has he C.have they
I suppose it's time we called it a day,_____?
A.didn't we B.isn't C.don't