Дайте форму минулого часу для підкреслених дієслів у теперішньому
часі:
1. He can communicate to native speakers quite well.
2. We are to return at 7 p.m. (We’ve got equipment).
3. She has to work at home today.
4. Student must be attentive at lessons.
5. We are to carry on an experiment.
6. Scientist must use new methods in their research.
7. All students of our University must carry out a number of experiments in the
laboratory.
8. I am to buy some new appliances.