Задание 1.
1. I learned English at the college.
2. She worked abroad.
3. They were in Moscow.
4. My friend had a computer.
5. We went to the south in summer.
Задание 2.
1. I don't have two classes every day.
2. We are not drivers.
3. They didn't visit me.
4. I am not at the college.
5. You won't work in summer.
Задание 4.
1. The passengers will be at the platform.
2. We won't see him off.
3. I will leave my suitcase in the hotel.
4. They won't come to the party.
5. The stewardess will offer sweets.
Задание 5.
1. I can swim.
2. May I help you?
3. Who can answer my question?
4. You must write it down now.
5. Your son can/must do this work himself. (Неудачное предложение для этого задания: несколько вариантов имеют право на существование.)
6. You may not/must not smoke here. (Неудачное предложение для этого задания: несколько вариантов имеют право на существование.)
7. You may take my book.
8. May I go to the cinema?
9. We can meet at 7 o'clock.