You (clean)...............................the room every day

1.You (clean)...............................the room every day?
2.Ms Dung (not take)....................................the bus to work yesterday.
3.Nam just (finish)...............................his homework.
4.If we plant more trees ,the air (not be).......................so polluted.
5. Children should not (buy)..........................firework at Tet.
6.The weather (be).................................quite good since Christmas.