题目内容：

    A computer can get very hot when it works on a lot of programs. It can cost a lot to cool the computer. So some scientists want to know what would happen when if the heat from the computer could be used.

Large Internet companies such as Google and Microsoft have thousands of computers. As these computers deal with information, they produce lots of heat, so they need huge cooling systems. These systems send the heat into the air.

A company in the Netherlands thinks paying to make the computers work and then paying again to cool them are a waste of energy. So the company developed a special device—the e-Radiator.

Boaz Leupe, head of the company, says that e-Radiator works as a heating system and saves money. He explains that the energy is used twice—once to heat the home and once to cool the computer and that the users don't have to pay to cool their computers.

Five homeowners in the Netherlands are testing the heating system in their homes.

"We pay for the computer usage, so in that way, homeowners get heating for free." Boaz says.

Jan Visser is one of the homeowners. "If you use the computer more, the e-Radiator produces more heat," he says. "It cannot provide enough heat if you don't use your computer often." But he is ready to try it. It's a great help to his family.

The company says e-Radiators produce heat temperature of up to 55℃. It says the system could save its users about $ 440 a year.

1.Which of the following is true?

A.Before the e-Radiator appears, the heat of a computer is usually sent into the air.

B.Google and Microsoft don't need huge cooling systems.

C.Google and Microsoft developed a special device-the e-Radiator.

D.The heat of a computer usually makes the computer work better before the e-Radiator appears.

2.What is the e-Radiator mainly used to do?

A.To help Google B.To provide heat. C.To heat the computer. D.To clean the computer.

3.How much could the system save its users a month?

A.About 220 dollars. B.About 440 dollars. C.About 44 dollars D.About 36 dollars.

4.What would be the best title for the passage?

A.A New Company B.How to Heat Computers

C.A New Way to Heat Homes D.How to Solve Environment Problems