Câu hỏi :

What causes the air pollution?

A. fumes from vehicles.

B. poisonous gases from factories.

C. waste from everywhere

D. All are correct

* Đáp án

D

* Hướng dẫn giải

Dẫn chứng: Air pollution is the first kind. It mostly comes from fumes released from motorbikes, cars, airplanes, trains and poisonous gases emitted from factories. Also, waste is dumped anywhere, even in the city where many people are living. 

Copyright © 2021 HOCTAP247