B. Fill the sentence with the correct modal verbs. Choose from CAN, MUST, HAVE TO, SHOULD, OUGHT TO, CAN'T and MUSTN'T.

1. You _________ look after your old parents.
2. He _________have studied more for the final exam and spend less time playing with the computer.
3. _________ I have a cup of tea, please?
4. You _________ be polite to others
5. Challenges___________ not keep us from achieving our dreams.
6. Before one talks about an issue, he/she ____________ read about it first.
7. ____________ I stay with the group?
8. You ____________ park here ma'am. The parking lot is full.
9. You __________ use Mandela's speech to inspire the youth.
10. You ____________ make noise while the session is on-going. ​