Read the following passage and mark the letter A, B, C or D to indicate the correct answer to each of the questions.

Saving energy does not have to be expensive or time-consuming. But what can you do to save energy? There is plenty that you can do to help the process of energy conservation. You can save energy by following these simple rules: making sure that the kettle does not contain more water than needed; always washing a full load in the washing machine rather than a half load; turning down your central heating by 1°C - this could cut your heating bill by 10%; being sure that hot water taps are not left running and replacing washers if your taps drip, turning off any lights and your computer at work. If you are not using them, change to energy-saving light bulbs which use around a quarter of the electricity of standard bulbs and will last eight times longer; close your curtains at dusk to keep the warm air from escaping through the windows; and switch off electrical appliances when they are not in use makes a big contribution to energy saving too.

36. If you turn down your central heating by 1°C, what percent could this cut your heating bill?

A. 10%                                    B.90%                         C. 35%                                    D. 15%

37. The word “cut” in the passage is closest in meaning to _____________.

A. destroy                   B.raise                         C. reduce                     D.increase

38. The word “they” in the passage refers to _____________.

A. electrical appliances                                   B. windows    

C. curtains                                                       D. ordinarybulbs

39. Which of the following sentences is NOT true, according to the passage?

A. Energy-saving light bulbs should be used in order to save electricity.

B. Turn off electrical appliances if we do not use them.

C. We should dust our curtains so that our house looks more beautiful.

D. The ways to save energy are not time-consuming or costly.

40. What is the main topic of the passage?

A. How to keep your house warm                  B. How to protect the environment

C. How to use light bulbs                               D. How to save energy