Масса чемодана равна d кг, а сумки - в 4 раза меньше. На сколько килограммов сумка легче чемодана?

Must
Can ... Can not
Will ... Will not
Must
Can ... You can
Must
Must not
Must
Can / can not / can
Will not be

1. I have a toothache.
You should visit the dentist.
2. Dolphins can swim, but they can`t fly.
3. Will you go away for the weekend?
No, I won`t.
4. You must make any noise in class.
5. Can I have a piece of cake, please?
Of course you can.
6. Students must always bring their homework.
7. Visitors mustn`t take  pictures in the gallery. It s not good for the paintings.
8. Tonia has a headache. She should take an aspirin.
9. Can you play the piano?
No, I can`t, but i can play the guitar.
10. In the future there will be any schools.
Student will have classes online.