Запишите предложения и подчеркните в них модальный
глагол или его эквивалент. Переведите.
1. Mathematical analysis is used when the facts can be presented
in numbers.
2. These researchers will have to use up-to-date materials in their
modern apparatus.
3. As the construction of the new plant was an international
project, scientists from different countries had to take part in it.
4. The foreman is the person who gives instructions how the
work is to be done.