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Do you forget to turn off the lights and heaters when you go out of a room? In 2040 it will not matter. They will turn themselves off—and on again when you return. You will choose the temperature for each room, the lighting and the humidity. A sensor will find the presence of a human (and, with luck, ignore the dog!) and turn the systems on, and when the humans leave it will turn them off again.

The sensors will work through the central home computer, and they will do much more than just turn the fires and lights on and off for you. They will find faulty electrical appliances, plugs or switches, separate them so that they cannot harm anyone, and then warn you that they need repair. They will detect(发现) fire and if you are out of the house, the computer will call the fire brigade. It will not be too difficult because the locks on the outside doors will be electronic. You will open them using your personal card—the one you use for shopping—maybe using a number known only to you.

It will be impossible to lose the key, and a housebreaker will have to tamper(拨弄) with the lock or with a window. It is not very difficult to make such tampering send a signal to the computer.

The computer will be more than a fireman-policeman-servant. It will be an entertainer, and most of your entertainment will come right into your home. It does now, of course, but by 2040 “entertainment” will mean much more. For one thing, you will be able to take part actively, rather than just watching.

46.   The author intends to tell us that _____.

A. in 2040 we will live without lights and heaters

B. in 2040 we will use much more lights and heaters

C. in 2040 there will be no switches of lights and heaters

D. in 2040 lights and heaters will be on and off automatically

47.   Which of the following statements is NOT true?

The sensor is multi-functional.

Without a computer, the sensor cannot do much.

The sensor will detect fire and make an emergency call.

You can be taken for a housebreaker if you tamper with the lock or with a window.

48.   According to the author, in 2040, new technology _____.

A. will free us from the keys we use today

B. will turn everything into sensors

C. will make the locks out of date

D. will get rid of all crimes

49.   Thanks to computers, in 2040 people _____.

A. will have no entertainment outside

B. will replace TV with computers

C. will be controlled by computers

D. will have more fun at home

50.   The best title for the passage might be _____.

A. Sensors and Computers

B. Life at Home in the Year 2040

C. The Development of Science and Technology

D. Lights and Heaters in the Year 2040

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Do you forget to turn off the lights and heaters when you go out of a room? In 2040 it will not matter. They will turn themselves off—and on again when you return. You will choose the temperature for each room, the lighting and the humidity. A sensor will find the presence of a human (and, with luck, ignore the dog!) and turn the systems on, and when the humans leave it will turn them off again.

The sensors will work through the central home computer, and they will do much more than just turn the fires and lights on and off for you. They will find faulty electrical appliances, plugs or switches, separate them so that they cannot harm anyone, and then warn you that they need repair. They will detect(发现) fire and if you are out of the house, the computer will call the fire brigade. It will not be too difficult because the locks on the outside doors will be electronic. You will open them using your personal card—the one you use for shopping—maybe using a number known only to you.

It will be impossible to lose the key, and a housebreaker will have to tamper(拨弄) with the lock or with a window. It is not very difficult to make such tampering send a signal to the computer.

The computer will be more than a fireman-policeman-servant. It will be an entertainer, and most of your entertainment will come right into your home. It does now, of course, but by 2040 “entertainment” will mean much more. For one thing, you will be able to take part actively, rather than just watching.

46.   The author intends to tell us that _____.

A. in 2040 we will live without lights and heaters

B. in 2040 we will use much more lights and heaters

C. in 2040 there will be no switches of lights and heaters

D. in 2040 lights and heaters will be on and off automatically

47.   Which of the following statements is NOT true?

The sensor is multi-functional.

Without a computer, the sensor cannot do much.

The sensor will detect fire and make an emergency call.

You can be taken for a housebreaker if you tamper with the lock or with a window.

48.   According to the author, in 2040, new technology _____.

A. will free us from the keys we use today

B. will turn everything into sensors

C. will make the locks out of date

D. will get rid of all crimes

49.   Thanks to computers, in 2040 people _____.

A. will have no entertainment outside

B. will replace TV with computers

C. will be controlled by computers

D. will have more fun at home

50.   The best title for the passage might be _____.

A. Sensors and Computers

B. Life at Home in the Year 2040

C. The Development of Science and Technology

D. Lights and Heaters in the Year 2040

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Don't forget to turn ________ the lights and lock the door when you leave the room.

[  ]

A.off

B.up

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Don't forget to turn ________ the lights and lock the door when you leave the room.

[  ]

A.off

B.up

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  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 your heating and cooling system can improve efficiency and comfort.Clean or replace filters monthly or as needed.

  For central air conditioning systems and room sir conditioners, look for the ENERGY STAR, the federal government’s symbol for energy efficiency.For central air, purchase the system with the highest possible Seasonal Energy Efficiency Ratio(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, turn off the ceiling fan.

  Let a programmable ibermostat“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 cresting 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 beat 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 Jess beat and lasting up to 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 U.S.commutes(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.

(1)

Acoording to the passage, the thermostat is used to ________.

[  ]

A.

make rooms quieter

B.

control room tempersture

C.

turn off the air conditioner

D.

reduce room air pollution

(2)

We can conclude from the passage that the author probalily discourages ________.

[  ]

A.

planting leafy trees around your home

B.

turning off the ceiling fan before you leave your house

C.

keeping your south-facing windows open during the day

D.

using fluorescent bulbs instead of incandescent bulbs

(3)

This passage is mainly about ________.

[  ]

A.

energy-saving tips

B.

fuel-saving tips

C.

do it yourself tips

D.

environment-protecting

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