Câu hỏi:

Why/ not/ we/ sing/ English song?

They use ________ plastic bottles to keep water.

We/ should/ spend/ money/ recycling

Water is used to generate __________.

They are using leaves __________ food.

Air pollution is one of _________ (6) problems of the current time all over the world. There ___________ (7) a lot of reasons for this pollution. First of all, the release of air pollutants such as smog and solid materials cause air pollution and health issues ___________ (8) human. ___________ (9) dirty wastes in big cities are polluting the whole atmospheric air. Thirdly, motor vehicles are releasing polluted gases contributing to the air pollution. Finally, some natural ________ (10) like dust, soil particles, and natural gases are also the source of air pollution.

Question 7