Read the following article and select the best answer. Article: How important is your mobile phone, better known to Americans as a cellphone? Jack said, "I use my phone all the time. I'm always on my phone." Ann said, "It's important to me because it's like my life saver." Jenny said, "I need my cellphone. I cannot live without it." So far, no studies have proven beyond question that the radio signals from cellphones cause brain cancer or other health problems. But a new study by government scientists in the United States has some people wondering what to think. The scientists have found that holding a cellphone to your ear for more than fifty minutes increases brain cell activity. Even the scientists themselves are not sure about the meaning of their findings. Dr Nora Volkow led the study. She heads the National Institute on Drug Abuse, part of the National Institutes of Health. Dr Volkow says she is not concerned that fifty minutes of cellphone exposure would harm anyone. But she says the research does show the need to study whether there are long-lasting effects of repeated exposure over several years. Her team studied forty-seven healthy volunteers between January and December of 2009. The volunteers had cellphones placed against both ears while the scientists made images of their brain activity. As part of the test, one phone was activated for fifty minutes. The other phone was off. After that, the volunteers were tested with both phones turned off. Dr Volkow says the brain scans showed increased activity in brain cells closest to the activated phone. The scans showed how the brain cells used sugar to produce energy, a normal activity. The activity was seven percent higher in areas of the brain closest to the cellphone antenna . Dr Giuseppe Esposito is a nuclear medicine expert at Georgetown University Medical Center in Washington. He says after many years of studies, better kinds of research are still needed to settle questions about cellphone safety. These studies would take years. Question: The results of the study tell us that _ . - people use cellphones for too long every day - using cellphones has an effect on brain cells - cellphones that are powered off can also affect the brain - increased activity in brain cells has many causes
using cellphones has an effect on brain cells

Read the following article and select the best answer. Article: Growing up in the 1950s, I was a 10-year-old risk-taker who caused his mom lots of stress. Once I got into my aunt's car so I could pretend to be a race car driver and accidentally knocked the parking gear stick off. The car rolled down the driveway as fast as it could go, crossed the road and finally stopped up against my neighbor's curb . I thought it was fun, but Mom didn't think so. Normally I would see a spanking coming, but this time I lucked out. I guess she was glad I was all right. I enjoyed watching The Adventures of Superman on television so much that I wanted to fly just like him. One day I got into the closet and picked one of Mom's best pillowcases . I went out onto the front yard and tied the case around my neck, pretending it was a cape. Then, standing on the side of the porch , which was about 7 feet high, I jumped. The spanking my mother gave me didn't hurt as much as my scraped knees. But the worst thing I ever did happened when I tried to impress the new girl across the street. She was incredibly cute, so I went over and introduced myself. After I told her my name, she said she wanted to show me something she had found. We went into her backyard, and in the knot of the biggest and oldest tree was a beehive. She said she liked honey and asked me how to get it out. "We could stand watch, and when they leave the hive, we can reach in and take the honey," I suggested. A large group of the bees flew away, so I moved closer to the hive. I was brave and maybe just a little crazy. I managed to take a little bit of honey when a bee rested on my arm. I killed the bee, and then it seemed like thousands of bees flew toward me. My new friend screamed and ran. I ran as fast as I could across her yard and up the long hill to my front door. I never looked back. The sound of the bees behind me told me the coast wasn't clear. When the group of bees attacked, I screamed for my mom. As I reached my front door I saw her swinging a broom around me to get the bees off me. I didn't care that she landed a... Question: What's the author's impression of his mother? - Strict but loving. - Gentle but brave. - Patient and tolerant. - Serious and reasonable.
Strict but loving.

Read the following article and select the best answer. Article: It is probably the strangest sport anyone has ever invented.And at first sight,it looks like the easiest.Competitors have to do two things.The first is to stand still.The second is to place their hands anywhere on the body of a car,and keep it there. This is where things start getting difficult.Lots of people are doing the same thing.And the winner of the "handathon" contest is the person who can carry on doing it for the longest time.That person gets to own the car. It still seems to be an easy thing to do.At the beginning it is.Anyone can stand still.But when the contest has been going for four or five days,standing still seems like the most difficult job in the world.And keeping the hand in place over this time becomes an act of serious attention.After a few days,the hand seems to belong to someone else--someone who wants to go home and get some sleep. Competitors are allowed to take a five-minute break every hour to eat,drink or do whatever else is necessary.No one is allowed to lean on the car for support.Winners need to be able to show great powers of attention.They also need to be able to develop special skills. Maybe the popularity of the handathon is due to the fact that it is not necessary to be a trained athlete to enter.Entrants in the Longview handathon certainly don't seem to do much preparation.Most say they will prepare by "getting lots of sleep".Others say they will "eat healthy food" or "pray for success".The whole event gives ordinary people the chance to do something interesting and win something in the end. Handathons are competitions,but there is little rivalry between competitors.They help each other out and keep each other's spirits up.People who drop out early return with food,drink and encouragement. Question: Which of the following about handathon is not right? - The person who takes part in it should stand still. - The person who takes part in it has to place his hands anywhere on the body of a car,and keep it there. - The person who takes part in it can have a break during the course of the competition. - Handathons are competitions,so competitors don't encourage each other.
Handathons are competitions,so competitors don't encourage each other.