Поставьте в пропуски must, mustn39;t, have to, don39;t have to, can

Поставьте в пропуски must, mustn39;t, have to, don39;t have to, can or can39;t 1) A:Do we ......finish this exercise in class? B: No, you..... . You ..... finish it at home if you like - but you ..... finish it before the next lesson!2)A: I hate waitingfor the bus in the morning!B: Fortunately, I ...... take the bus, because I go to school by bike.3) A: You ..... help me with the washing-up if you39;re busy, you know B:No, I39;m happy to help- but I...... forget to write my report for tomorrow4) A:I39;m afraid I..... go out with you tonight - I ...... visit my parents B: ...... I come with you,then?