英语,You --- in your homework by now,but to my disappointment,

英语,You ___ in your homework by now,but to my disappointment,you didn't.A.are supposed to han
You ___ in your homework by now,but to my disappointment,you didn't.A.are supposed to handed.B.must have handed.C .are supposed to hand.D.must hand.帮忙翻译下,并说明选项的理由,