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Question 35. What is the main idea of the passage?
A. How to plant trees successfully
B. Ways to protect the environment.
C. The importance of recycling.
D. The benefits of public transport.

Question 36. The word "They" in the 2nd paragraph refers to:
A. Resources
B. Showers
C. Trees
D. Animals

Question 37. The word "sustainable" in the 1st is OPPOSITE in meaning to
A. increase
B. improve
C. widen
D. prevent

Question 38. According to the passage, why should we use water efficiently?
A. To save the natural resources
B. To protect the environment.
C. Using less electricity
D. Limiting household waste

Question 39. Which activity is NOT mentioned to help protect the environment in the passage?
A. recycling paper
B. using public transport
C. eco-friendly
D. organic

Reference: http://oceana.org