IV.Combine each pair of sentences to make a conditional sentence type 1.( Nối 2 câu  với nhau dùng câu điều kiện loại 1)

1.Students are more aware of protecting the environment. Teachers teach environmental issues at school.

If …………………………………………………………………………………………………

2.Light pollution happens. Animals change their behaviour patterns.

If ………………………………………………………………………………………………..

3.The levels of radioactive polluion decrease.We switch from nuclear power to renewable energy sources.

If …………………………………………………………………………………………………..

4.The water temperature increases.Some aquatic creatures are unable to reproduces.

If…………………………………………………………………………………….....................

5.People get more diseases.The water is contaminated.

If …………………………………………………………………………………………………