Chọn đáp án đúng: 1) Two students didn't do ... their Math homework yes terday

1. Two students didn't do...their Math homework yes terday.
A.his             B.theis           C.our          D.her
2.My mother has a new car. ....colour is white.
A.Its             B.It's               C.Their       D.Theirs
3.Mary is trom England. ....husband is from Australia.
A.his            B.he                C.her          D.hers