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By using less energy, you can reduce pollution that causes global （全球的） warming, An energy-saving light bulb （燈泡） uses less energy to produce the same amount of light as a regular bulb, Use the chart to compare a regular bulb with an energy-saving bulb．

    Regular Light Bulb

Energy-Saving Light Bulb

 Name

 Incandescent light bulb

Compact fluorescent light bulb（CFL），energy saver

 Price

 50 cents

$5

 Cost of energy

Used in one year （4 hours a day）：$9.3

 Used in one year（4 hours a day）：$2.5

 Energy used

75 watts（Most of this

energy is wasted as heat．）

 20 watts

 Lifetime

 1.000 hours

 10,000 hours

（   ） 1．How much more energy does the regular bulb use than the CFL bulb if they are used for a year （four hours every day）?

A．75 watts.          B．55 watts.          C．20 watts.                D．50 watts.

（   ） 2．How many regular bulbs does a CFL bulb equal （等同于） in lifetime?

A．1               B．5.                C．10.               D．20.

（   ） 3．I bought a regular bulb and Tom bought a CFL bulb．If we both used the bulb for four hours a day, how much money would Tom save in all after a year?

A．$ 2.3.             B．$ 90.5.            C．$ 6.8.             D．$ 95.5.

（   ） 4．Why do regular light bulbs use so much energy?

      A．They make more light than CFL bulbs.

      B．They can be used for a longer time than CFL bulbs.

C．They waste most of their energy as heat.

D．It's because of their shapes.

（   ） 5．What does the writer try to tell us according to the passage?

A．Using more energy can produce less pollution.

      B．Energy-saving light bulbs are cheaper than regular ones in shops.

      C．It is a good idea to use energy-saving CFL bulbs instead of regular ones.

D．An energy-saving light bulb is easier to get broken.

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