Подчеркните в каждом из них модальный глагол или его эквивалент, предложения переведите на язык. scientists must use new methods in their research work. the chemist could easily define the properties of this solid. hydrogen can be used as a fuel in transport, industry and home. the students had to work hard to improve the project.

ibufiz18    3   01.07.2019 01:10    2