Câu hỏi:

seven/ fifteen/ He/ to/ goes/ at/ work.

We ___________ a survey to know more about recycling

We can find noise pollution __________ most cities.

If we continue to deforest, our earth ___________ polluted.

If you turn _________ the lights when you don’t use it, you will save electricity.

We can use this bottle once again.

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