Read the following article and select the best answer. Article: Cellphones: is there a cancer link? Could your cellphone give you cancer? Whether it could or not, some people are worrying about the possibility that phones, power lines and wi-fi could be responsible for a range of illnesses, from rashes to brain tumors. Some say there is evidence to support the growing anxieties. David Carpenter, a professor of environmental health sciences at the university at Albany, in New York, thinks there's a greater than 95 percent chance that power lines can cause childhood leukemia . Also there's a greater than 90 percent chance that cellphones can cause brain tumors. "It's apparent now that there's a real risk," said Carpenter. But others believe these concerns are unjustified. Dr Martha Linet, the head of radiation epidemiology at the US National Cancer Institute, has looked at the same research as Carpenter but has reached a different conclusion. "I don't support warning labels for cellphones," said Linet. "We don't have the evidence that there's much danger." Studies so far suggest a weak connection between EMFs and illness -- so weak that it might not exist at all. A multinational investigation of cellphones and brain cancer, in 13 countries outside the US, has been _ for several years. It's funded in part by the European Union, in part by a cellphone industry group. The final report should come out later this year, but data so far don't suggest a strong link between cellphone use and cancer risk. Question: From the passage we can learn that some people are worried because _ . - they have evidence the use of cellphone can lead to cancer. - they make a fuss over cellphone use. - some expert has given a warning. - cellphones are responsible for brain tumors.
some expert has given a warning.

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Read the following article and select the best answer. Article: Taking the train is a wonderful way to see America. In the 19th century, train routes appeared from coast to coast, carrying both people and goods Today, a long-distance Amtrak train trip is a different way to experience the United States. The long-distance Amtrak trains have lots of room. Coach seats have lots of leg room and wide aisles ,sightseeing lounges have large windows, and sleeping areas can provide a good night's rest. On a train trip, there's time to talk, play cards or board games, and read to one another. On a car trip, parents have to drive while on a train, parents can sit back and watch the scenery go by. Unlike an airplane, traveling by train is not the quickest way to arrive at your destination; the train is the destination in itself. Amtrak manages long-distance trains that run through the United States. Routes have different names, such as Empire Builder, California Zephyr, Sunset Limited and Southwest Chief. The long-distance trains have double-decker cars(Superliners), sightseeing lounges, and a real dining car. On shorter trains, such as from New York to Washington. DC, the cars are single level and only have a snack bar. In the Superliner trains, the sightseeing lounge is lined with windows on the second level while on the lower level a snack bar and tables can be found. In the evening, videos are shown in the lounge car--either entertaining movies or documentaries. Tip: As delays are common on Amtrak trains, always call the station before you go there. Otherwise, . Question: What's the advantage of seeing America by train? - There are more services on the train than any other - Traveling by train is the quickest way to reach your destination. - Traveling by train gives people more time to see and do things. - The trains like Amtrak allow people to enjoy the journey cheaply.
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Traveling by train gives people more time to see and do things.

Ques: Read the following article and select the best answer. Article: The space shuttle Columbia flared and broke up in the skies over Texas on Saturday, February 1,2003, killing the seven astronauts on board in what NASA and President Bush called a tragedy for the entire nation. NASA launched an investigation into the disaster and began searching for the astronauts' remains. It said that although there had been some data failures it was too early to nail down a precise cause. The break-up, 16 minutes before the shuttle was due to land at Kennedy Space Center in Florida, spread possibly toxic debris over a wide swath of Texas and neighboring states. Dramatic television images of the shuttle's _ clearly showed several white trails streaking through blue skies after the shuttle suddenly fell apart. It was almost 17 years to the day that the Challenger shuttle exploded on Jan. 28, 1986, killing all seven astronauts on board. Take-off and re-entry into Earth's atmosphere are the most dangerous parts of a space mission. In 42 years of US' human space flight, there had never been an accident in the descent to Earth or landing. Challenger exploded just after take-off. Rescue teams scrambled to search for the remains of the crew, which included the first Israeli to fly on the shuttle, former combat pilot Col. Ilan Ramon. There were warnings that parts of a vast 120-mile-long corridor of debris could be toxic because of poisonous rocket propellant . "We are not ready to confirm that we have found any human remains," Nacogdoches County Sheriff Thomas Kerrs said. He added that among the roughly 1,000 calls reporting debris, some people said they found remains of crew members. "The Columbia is lost. There are no survivors, Their mission was almost complete and we lost them so close to home. ... America's space program will go on," said a grim-faced Bush in a message broadcast on television, which included condolences to the families of the dead astronauts. Question: The word "descent" in the passage means _ . - taking off - landing - orbiting - walking down
Ans: landing

Read the following article and select the best answer. Article: The first MP4 player was born years ago. Soon many music fans were wondering how fantastic it is! If you have been into technology enough, perhaps you may have a knowledge of the MP4. If not, you do need to know something before buying one, even if you are familiar with MP3. MP3 is the CD-like disc with greater capacity. How about MP4? This small digital product will really enrich the joy from listening to music. You can even feel the "touch" of music to your soul! Now, some similar digital products advertised as "MP4 players" are simply MP3 players, which do not play video and MPEG format and also lack other particular functions. These products confuse some buyers, as they may think the "MP4" players simply mean they can do more than MP3. What is MP4?! It is a multimedia container. It is not only used to store digital audio and digital video streams, especially those of MPEG, but can also be used to store other data such as subtitles and pictures. As a most modern container format, it allows streaming over the Internet. With the help of a piece of MP4 video equipment, you can change various programs such as MPEG to MP4, ASX to MP4, AVI to MP4 and so on, which can be done very quickly and easily without any effect on the sound quality. By installing DVD-MP4 software, you can transfer particular music from a DVD to an MP4 video file. It really excites your listening music experience. Then, there is MP4 advanced and you can set your own collection of all the programs -- TV shows, games, and music. You can even see movies which are still running in cinemas. _ ? Question: From the last sentence, it's clear that the writer tries to tell us it is _ . - reasonable to buy other digital products - impossible to buy something else - a very wise choice to buy an MP4 - an exciting experience to buy an MP3
a very wise choice to buy an MP4