unit 9

The water in this river is so___that we can't use it

• eliminated

• contaminated

• threatened

• operate

The government should ___more national parks to protect the endangered species.

• add

• recognize

• establish

• preserve

We should use environmentally friendly materials to___the environment

• damage

• Preserve

• Reduce

• Threaten

Ann told us that she would take a holiday___

• this month

• tomorrow

• The next month

• The month before

John told me that his father___in the garden then

• worked

• Was working

• has worked

• Is working

___contributes mainly to the greenhouse effect which can lead to a series of environment problems

• Air pollution

• Water pollution

• Soil pollution

• Noise pollution

The___ is the rise in temperature caused by gases in the atmosphere.

• climate change

• greenhouse effect

• global warming

• Deforestation

Local people had better be aware___the need for protecting the environment

• at

• of

• To

• In

What diseases can air pollution cause?

• heart diseases

• lung diseases

• back diseases

• Liver diseases

What else can cause air pollution in cities?

• The gases from the exhausts of cars

• The smoke from the cars

• The ice near the Poles

• The gases from the factories