Circle the correct word. 1) The girl is rather young; she mustn't/can't be awake so late. 2) I think you mustn't/ can't work harder. 3) Mustn't/Can't you sit still? 4) The car is his father's, we mustn't / can't take it. 5) Our teacher mustn'/can't be late for the classes either. 6) The water is rather hot, but I think you must/can drink it. 7) The soldiers mus / can obey their officers. 8) You must/ can pay for your lunch yourself if you want. 9) Must/Canl use your bathroom? 10) I must/can work harder, so I may be helpful.