4. Откройте скобки, употребив глагол в скобках в нужном времени 1) As sewage (to enter) a plant for treatment, it (to flow) through a screen.
2) After sewage (to be screened), it (to pass) into a grit chamber.
3) Your community (to have) one or more sewage treatment plants?
4) Many factories and industries (to use) cool water from nearby rivers and lakes.
5) Water pollution may (to be) due to several reasons.

romamarunp016li    3   29.11.2021 18:37    0