题目内容：

    You may charge(充电) your phone every day, but do you clean your phone as much? Whatever your hands touch, your phones touch. It has been discovered that some phones have 18 times more bacteria and viruses (细菌病毒) than any surface in a public restroom. So it  won’t surprise you that a 2011 University of London study found that one in six of our phones have bacteria and viruses on them.

The research on bacteria and viruses led to the invention of PhoneSoap. It is not actually liquid (液体). It is a phone charger that uses the electromagnetic radiation (辐射) to kill 99.9 percent of bacteria and viruses, cleaning your phone while it charges.

“Certain types of bacteria and viruses are really on our phones,” says Wes Barnes, the PhoneSoap founder. “It would be the fastest, most powerful way to kill them .”

PhoneSoap looks like a little metal suitcase. Your phone rests in to charge and get cleaned at the same time. Instead of plugging your phone into the wall, you’d plug it into the PhoneSoap charger box. The process only takes a few minutes but, Barnes says, “The idea is that you can leave it in there overnight if you want to keep charging. and it cleans the phone fully.”

The founder found the right companies and then started shipping the product in late November. By last week’s International Consumer Electronics Show in Las Vegas, PhoneSoap was very popular with people. The founder has left his present job and is selling PhoneSoap without a stop. “We sell out PhoneSoap every day, and we will try to provide enough PhoneSoap” Barnes says. “It’s been a great challenge.”

1.We can learn from the first paragraph that ___________.

A.phones can be very dirty B.phones are where bacteria are born

C.most phones are attacked by bacteria D.phones store more bacteria in a restroom

2.According to the passage, PhoneSoap ___________.

A.takes a whole night to kill bacteria B.deals with bacteria with radiation

C.is a kind of liquid D.has to be plugged into the wall to work

3.From the last paragraph, we can infer that ___________.

A.PhoneSoap is in great need now B.PhoneSoap is really hard to use

C.they won’t produce enough PhoneSoap D.they’ll make improvements to PhoneSoap

4.What’s the passage mainly about?

A.Methods of cleaning phones. B.Tips on charging phones quickly.

C.Soap killing harmful bacteria on phones. D.A phone charger keeping your phone clean.