V/

2: If there were'nt so many billboards in our city, people  could enjoy the view.

3: If there was'nt so much light in the city at night, we could see the starts clearly.

4: If we turned on the heater all the time, we would have to pay 3 million dong for electricity a month

5: If the karaoke bar made so much noise almost every night, the resident could complain to its owner.

6: If she worked in the noisy office, she could have a headache after work every day.

Questionn II/

1: studies

2: does'nt hurry

3: can

4: will be

5: gives

6: will not pass

7: does'nt stop

8: is

Question III/

1: If teacher teach environment at school, student will be more aware of protecting the environment

2: If light pollution happens, animals will change their behavior 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 cretures will be unable to reproduces

5: If people get more diseases, the water will be contaminated