THE BOY ……….PUT UP THE CHRISTMAS DECORATION IS MY BRATHER A.WHO B.W...

21- - KIEM TRA 45''''(PHU HOP HS DAI TRA)
KIEM TRA 45''''(PHU HOP HS DAI TRA)
21-The boy ……….put up the Christmas decoration is my brather a.who b.whom c.that d.a &c are correct