Помогите решить задание! (Англ. язык.)

1. I...help them yesterday as I was very ill. 2....I take your dictionary? 3. Yesterday we...not go to the cinema as we were very busy. 4. We...help our friends in trouble. 5. If you want, you...read the letter. 6. You...speak German quite well. Last year you...not speak it at all. 7. The students...study hard. 8. We...have lunch at the nearest station. There must be a snack-bar there.

Нужно вставить модальные глаголы: can, may, must.