Task 1. Choose the correct answer. 1) Jack can't / couldn't do his homework last night. Can you help him now? 2) She lives far from the office that's why she should / has to / must get up early. 3) Children must / need / don't have to listen to their parents. 4) When he was young he can / could play football really well. 5) He cooks every night. He can / could cook really well. 6) We have everything, we can't / needn't / shouldn't buy anything. 7) You look really tired. I think you must / have to / should take a few days off. 8) The hours of work are quite flexible – you can / have to / should do a minimum of thirty hours per week, but you don't have to / mustn't/ shouldn't start till 10 a.m. if you don't want to. 9) How will she write a book? She can't/couldn't spell! 10) When she got home last night the door was locked and she couldn't/can't open it. -