1. A ticket is not needed (need). 2. He ought to be more
careful (ought). 3. He wasn't able to swim when he was five (able). 4. He might win the race (might). 5. You mustn’t
play in their garden (mustn’t). 6. Their the car didn't need repairing (need). 7. You can’t eat so much
(can’t). 8. Shall I open the window (shall)? 9. She’s could still be at work (could). 10. Would you like me to help you
with that (would)? 11. She can’t be the woman who spoke to me
(can’t). 12. We needn’t go shopping with Mum (needn’t). 13. Can she
really be 50 years old (can)? 14. He'd better tell the truth (better). 15. You should study harder
(should).