. So before I go any further I want to thank you very much for inviting me to this important conference. A. participate in B. join to C. take part D. attend to 题目和参考答案——青夏教育精英家教网—

     The global energy crisis is approaching. What can we do? Here are some steps you can take.
     Cooling puts the greatest stress on your summer energy bill and the power grid (电网 ). Just as a
tune-up for your car can improve your gas mileage, a yearly tune-up of your heating and cooling system
can improve efficiency and comfort. Clean or replace filter monthly or as needed.
     For central air conditioning systems and room air conditioners , look for the ENERCY STAR, the
federal government's symbol for energy efficiency. For central air, purchase the system with the highest
possible Seasonal Energy Efficiency Ratia( SEER) .
     Use energy-efficient ceiling fans either alone or with air conditioning. Ceiling fans do a great job of
circulating air. When used with air conditioning , fans allow you to raise the thermostat (恒温器)  and
cut costs. Ceiling fans cool people, not rooms. so before you leave; tum off the ceiling fan.
     Let a  programmable  thermostat  " remember  for  you "  to automatically adjust the indoor climate
with your daily and weekend patterns to reduce cooling bills by up to 10 percent. You can come home
to a comfortable house without wasting energy and creating
pollution all day while you are at work.
     Try to make your home airtight enough to increase your comfort, make your home quieter and
cleaner and reduce your cooling costs up to 20 percent.
     Cut your air conditioning load, and reduce pollution by planting leafy trees around your home and
fixing reflective bricks on your roof.
     Close blinds or shades on south-and west-facing windows during the day , or fix shading equipment
to avoid  heat build-up.    Turn off  everything  not  in  use: lights, TVs, computers.  And  use fluorescent
bulbs(荧光灯),which provide bright,warm light while using
at least two-thirds less energy, producing 70 percent less beat and lasting up t0 10 times longer than
incandescent bulbs(白炽灯).
     Drive the car that gets better gas mileage whenever possible if you own more than one vehicle. If
you drive 12,500 miles a year, switching 10 percent of your trips from a car that gets 20 miles per gallon
to one that gets 30 mpg will save you more than $65 per year.
    Carpool. The  average  US  commuter(乘车上班族)   could  save about $260 a year by sharing cars
twice a week with two other people in a car that gets 20. 1 mpg-assuming the three passengers share the
cost of gas.

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