Ответ: Спасибо большое;)

Ответ: Пожалуйста)

Ответ: Скажите пожалуйста, а в этих двух предложениях правильно ?

Ответ: 1.A new concept is based on our understanding that Earth is an integral system. 2.Many of the water sources in the country have been polluted with industrial or communal waste. 1. is based- present simple passive, от глагола to base 2.have been polluted-present Perfect Passive, от глагола to pollute.

Ответ: 1. is being polluted — Present Continuous Passive Voice от глагола to pollute2. was made — Past Simple Passive Voice от глагола to make