Choose the correct verbs to rewrite the sentences with the same

Choose the correct verbs to rewrite the sentences with the same meaning. 1. It is necessary for you to phone Martin. (must/might) 2. It is possible that Ann will be here this evening. (can/might) 3. It is not necessary for you to wait. (mustn39;t/don39;t have to) 4. It is not good for people to watch TV all the time (mustn39;t/shouldn39;t) 5. Do you want me to open a window? (shall/will) 6. It is important for people to cooperate. (may/should) 7. John smoked when he was younger. (can/may) 8. It is possible that it will rain. (can/may) 9. Alan knows how to speak Spanish. (can/could) 10. I would like you to help me. (can/could)