Choose the best option : 1. I help you if you want. (must/can/may) 2. You finish half of the work yesterday. (could/may/can) 3. I sleep well yesterday (can't/mustn't/couldn't) 4. Pupils be late for classes. (can/may/must/mustn't) 5. We show these photos to her. (must/mustn't/can/can't) 6. Granny is sleeping. You make a nolse. (must/can't/mustn't) 7. People take care of nature. (can/may/must/should 8. People live on the Mocn. (must/may/can/can't) 9. Children go to bed late. (can/shouldn't/may) 10. Max take my umbrella. (must/can/may)