Choose the best answer to complete each sentence.

They are working to preserve the delicately balanced                of these wetlands. 

biodiversity         

ecosystem

environment        

surroundings

Choose one answer that has the same meaning to the underlined word.

Trees were plentiful and sawmills started appearing on area rivers, producing lumber for settlers.

Choose one answer that has the same meaning to the underlined word.

The park features well-preserved tropical rain forests and savanna, resulting in a diverse ecosystem consisting of endangered, large mammals.

Choose one answer that has the same meaning to the underlined word.

Much of the region's native vegetation has been damaged by developers who are building hotels along the coast.

Choose one answer that has the same meaning to the underlined word.

These remote islands are inhabited only by birds and small animals.

Mark the letter A, B, C, or D on your answer sheet to indicate the best answer to each of the following questions.

Burning garbage ________dangerous gases to the environment, and this may lead to global warming.

Choose the best answer to complete each sentence.

Recycling provides a method of reducing the amount of waste materials that gets to the landfills – thus ______ it less probable for environmental pollution to take place.

doing

trying

causing

making

Mark the letter A, B, C, or D on your answer sheet to indicate the best answer to each of the following questions.

Sometimes it’s better not to buy something new, and buy ________one instead.