Habitual, long－term mobile phone users could soon know if they are at the risk of developing cancer.

　　In what is believed to be a world－first study, human brain cells are being used to test the long－term effects of mobile phone radiation.

　　The study will use a device(装置) to simulate the effects of long － term exposure of the brain to electromagnetic radiation from mobile phones over a long period.

　　Testing will be done by researchers at Sydney's St. Vincent's Hospital. The project's chief investigator(调查者), Peter, a French researcher, said the trial would test whether mobile phone radiation causes cancer in longterm users.

　　Testing will either prove people's fear, or show that there is no effect on human brain cells or perhaps that the cells can become immune(免疫的) to electromagnetic radiation through repeated exposure.

　　During the study, brain cells will be exposed to electromagnetic radiation for an hour each day. Test results are expected in three to six months, with the final report to be published by the end of the year.

　　The research is unique because most previous studies have focused on short－term exposure on animal cells, which did not help understand the effects of years of regular mobile phone use on human brain cells.

　　As mobile phones become increasingly popular throughout our society, it is important that we understand as much as possible about the long－term effects of electromagnetic exposure, if any, on human health.

1．From the passage, what might cause mobile phone users to suffer from a deadly disease is ________.

[　　]

A．that there is some poison in mobile phones

B．mobile phone radiation

C．the polluted plastic covers of mobile phones

D．some parts of mobile phones

2．Which of the following statements is TRUE according to the passage?

[　　]

A．The testing is dangerous to people's safety.

B．Such a research is the first study in the world.

C．People feel afraid when they hear of doing such a test.

D．The test results will be published in three or six days.

3．Why will Peter do such an experiment?

[　　]

A．He wants to let people know if long－term mobile phone using will have negative effects on their lives.

B．He hopes to tell people how to use mobile phones better.

C．He wants to let people learn how to repair mobile phones.

D．He wishes to tell people how to pick mobile phones.

4．The passage is mainly ________.

[　　]

A．about how to use mobile phones safely

B．about how to protect mobile phones carefully

C．to warn people of possible harm if they use mobile phones for a long time

D．to tell people some scientists will do a test about long － term mobile phone users and their health

---______．

[　　]

A. Of course he does

B. He is sour

C. Oh, I don’t suppose so

D. Never mind