People know that cars pollute the environment. It _______
People know that cars pollute the environment.
=> It __________________________________________.
People know that cars pollute the environment.
=> It __________________________________________.
Đáp án: It is known that cars pollute the environment.
Giải thích: Câu bị động kép: It + be + Vp2 + that + S + V
Dịch: Người ta biết rằng ô tô làm ô nhiễm môi trường.