IV.1 If the factory weren't located near our village, There wouldn't be air pollution and noise pollution

2 If the local people had fresh water, they wouldn't have to use water from the polluted river

3 If the soil weren't badly polluted, trees and grasses could grow here

4 If Mr Quang didn't work in a noisy environment, his hearing wouldn't become worse

5 If we had enough money, we would take a trip to the space

V.1. The poem was written by Clement Clarke Moore in 1823

2 You should send Christmas cards a week before Christmas Day

3 The children said they were waiting for the school bus

4 This machine hasn't been used for years

10 She asked me if I needed an umbrella to go out

III.

1.If teachers teach environmental issues at school, students will be more aware of protecting the environment.

2. If light pollution happens, animals will change their behaviour patterns.

3. If the levels of radioactive pollution decrease, we will switch from nuclear power to renewable energy sources.

4. If the water temperature increases, some aquatic creatures will be unable to reproduces. 

5. If the water is contaminated, people will get more diseases.

ℂ𝕙𝕠 𝕞𝕚̀𝕟𝕙 𝕩𝕚𝕟 𝟝* + 𝕔𝕒̉𝕞 𝕠̛𝕟 + 𝕔𝕒̂𝕦 𝕥𝕣𝕒̉ 𝕝𝕠̛̀𝕚 𝕙𝕒𝕪 𝕟𝕙𝕒̂́𝕥 𝕟𝕙𝕒 >~<

~ 𝓒𝓱𝓲𝓵𝓵 𝔀𝓲𝓽𝓱 𝓶𝓮 ~