Millions of people are using cell phones today.In many places it is actually considered unusual not to use one.In many countries,cell phones are very popular with young people.They find that the phones are more than a means of communication--having a mobile phone shows that they are cool and connected. The explosions around the world in mobile phone use make some health professional worried.Some doctors are concerned that in the future many people may suffer health problems from the use of mobile phones.In England,there has been a serious debate about this issue.Mobile phone companies are worried about the negative publicity of such ideas.They say that there is no proof that mobile phones are bad for your health. On the other hand,why do some medical studies show changes in the brain cells of some people who use mobile phones?Signs of change in the issues of the brain and head can be _ with modern scanning equipment.In one case,a traveling salesman had to retire at a young age because of serious memory loss.He couldn't remember even simple tasks.He would often forget the name of his own son.This man used to talk on his mobile phone for about six hours a day,every day of his working week,for a couple of years.His family doctor blamed his mobile phone use,but his employer's doctor didn't agree. What is it that makes mobile phones potentially harmful?The answer is radiation.Hightech machines can detect very small amounts of radiation from mobile phones.Mobile phone companies agree that there is some radiation.But they say the amount is too small to worry about. As the discussion about their safety continues,it appears that it's best to use mobile phones less often.Use your regular phone if you want to talk for a long time.Use your mobile phone only when you really need it.Mobile phones can be very useful and convenient,especially in emergencies.In the future,mobile phones may have a warning label that says they are bad for your health.So for now,it's wise not to use your mobile phone too often. People buy cell phones for the following reasons except that  _  . A) they're popular B) they're convenient C) they're useful D) they're cheap
D


Do you want to work with people, animals or machines? Do you want to work indoors or outdoors, directly serve people in need or serve people  behind the scenes? These are the typical questions that volunteer service agencies would ask. Every year, thousands of people in the west offer volunteer service. Volunteering greatly strengthens the community because it helps the old, the young, the weak, the sick, the disabled and the injured to overcome difficulties. Volunteers usually help in many different ways. They may give people advice, offer friendship to the young , drive the elderly to church, counsel kids against drugs, work as assistants in schools or nursing homes, raise funds, plant trees, help out in local libraries and do many other things. Volunteering can be a few hours a week or a few hours a month. Anybody who wants to serve people in need can become a volunteer. The art of volunteering is a process of both giving and receiving. Volunteering allows volunteers to meet new people, make new friends and mix with people from all walks of life. Volunteering is an excellent way to experiment,practice and try out new techniques and skills,discover your individual talents and explore career choice. Being a volunteer will take individuals on a wonderful journey and help them learn many important things beyond their school learning. You can infer from the passage that to be a volunteer, A) you need to get trained B) you can get something valuable C) you must be outgoing D) you need to work very long
B


Q: I have this old clock that belonged to my mom. My dad gave it to me years ago after mom passed away. I have mixed feelings about having the clock. I love it because it was my mom's, but it also holds some bad memories. You see, it chimes. It counts out the hour and rings once on the half hour. Or at least it used to. Now you never know what number it will ring. When my mother was at home dying from cancer, she asked for the clock to be unplugged. Hearing the hours count down really angered and frightened her. Mom passed away. I decided I wanted to get the clock fixed so I could remember the good hours we had with her. I took it to a local clock shop the other day. "I know this has no particular value as a clock, but it was my mom's and I need to get it fixed," I said to the shop owner. I went on to describe the problem. "We get a lot of these in," he told me. "Here's what I do. We remove the clock works   and replace it with a battery-operated movement   that chimes electronically," he told me. "You can't fix this?" "No, we don't have the time nor the parts." I thanked him and went home. I called a few other places and was told the same thing. "How incredibly sad," I told the last one disappointedly. How incredibly sad that we have become a society that replaces craftsmanship with convenience and easy fixes. We copy the original instead of creating something new. We duplicate  ; we don't originate  . Sadly, the same goes for our attitude to life itself. Each of us is an original, one of a kind. But we find it so much easier to copy another style than to develop our own. We are wannabes   rather than hey-world-look-at-mes. We fail to see the real value in who we are, so we spend our lives trying to be someone else. The author intends to   _  . A) criticize the irresponsible clock shop owners B) criticize people who do not value things with a history C) criticize people who do not have a creative attitude toward life D) criticize people's ignorance of traditional craftsmanship
A: C


(Q).
If you really want to go green, here's good news: eating green is good for you. The very foods with a high carbon cost---meat, pork, dairy products, processed snacks---also tend to be filled with fat and calories. A green diet would be mostly vegetables and fruits, whole grains, fish and lean meats like chicken---a diet that's eco- and waistline-friendly. Eating green can be healthier and beneficial to the climate. It may be hard to believe that a meal at McDonald's produces more carbon than your trip to a far away place. More than 37% of the world's land is used for agriculture, much of which was once forested. Deforestation   is a major source of carbon. The fertilizer   and machinery needed on a modern farm also have a large carbon footprint, as does the network of ships and trucks that brings the food from the farm to your plate. The most efficient way to reduce the carbon footprint of your menu is to eat less meat, especially beef. Raising cattle takes a lot more energy than growing the equivalent   amount of grains, fruits or vegetables. What's more, the majority of cattle in the U.S. are fed on grain and loads of it---670 million tons in 2002---and the fertilizer used to feed that creates separate environmental problems. Focus on eating lower on the food chain, with more plants and fruits and less meat and dairy. It's simple. We can change today what goes into our bodies for the health of our planet and ourselves. What will not lead to carbon in the agriculture? A) Deforestation B) Fertilizer C) Machinery D) Grains
(A).

D