Read the following article and select the best answer. Article: Scientists in Israel have discovered a new way to test for water pollution by "listening" to what the plants growing in water have to say. By shining a laser beam on the tiny pieces of _ floating in the water,the researchers said they hear sound waves that tell them the type and amount of contamination in the water. "It is a red light,telling us that something is beginning to go wrong with the quality of water," said Zvy Dubinsky,an aquatic biologist at Israel's Bar Ilan University."Algae is the first thing to be affected by a change in water quality.""The secret," he said,"is to measure the rate of photosynthesis in the algae,meaning the plant's ability to transform light into energy." During photosynthesis,plants also release oxygen into the air. Dubinsky's technique is easy to perform because of the overabundance of algae in the planet's water.Most of the oxygen in the atmosphere comes from algae.A prototype tester that occupies about one square meter of a laboratory desktop,shoots a laser beam at water samples to stimulate photosynthesis in the algae.But not all of the laser's heat is used.Depending on the condition of the algae and the rate of photosynthesis,some of the heat is shot back into the water,creating sound waves,Dubinsky said.With a special underwater microphone,researchers are able to analyze the strength of the sound waves and determine the health of the algae and the condition of the surrounding water. "Algae suffering from lead poisoning,like waste discharged from battery and paint manufacturing plants,will produce a different sound than those suffering from lack of iron or exposure to other toxins," said researcher Yulia Pinchasov.She said that testing algae photosynthesis can determine water quality more accurately and easily than laborintensive methods now used like chemical and radioactive carbon testing. Question: What would be the best title for the passage? - Scientists Listen to Plants to Find Water Pollution - A Prototype Tester Is Used to Determine Water Pollution - The Importance of Photosynthesis of the Algae - The Problem of Chemical and Radioactive Carbon Testing
Scientists Listen to Plants to Find Water Pollution

Read the following article and select the best answer. Article: The highlight of my journey was to be Paris,the city I'd always longed to see.But now I was frightened to travel without a companion.I steeled myself and went anyway.I arrived at the train station in Paris panicked.Pulling my red suitcase behind me,I was pushed by sweaty travelers . On my first Metro ride, I encountered a clumsy pickpocket.I melted him with a look,and he eased his hand from my purse to fade into the crowded car. At my stop,I carried my heavy suitcase up the steep stairs and froze in confusion.Somewhere in this confusing city my hotel was hidden,but suddenly I couldn't read my own directions.I stopped two people.Both greeted me with that Parisian face that said:"Yes, I speak English,but you'll have to struggle with your French if you want to talk to me." When I finally found the hotel,my heart was pounding. Then when I saw my room.I couldn't stay.Could I? The wallpaper looked like it had been through a fire.The bathroom was down the hall,and the window looked out onto the brick wall of another building.Welcome to Paris.It was my third week away from home and my kids,and I had arrived in the most romantic city in the world, alone, lonely and very scared. The most important thing I did in Paris happened at that moment.I knew that if I didn't go out,right then,and find a place to have dinner,I would hide in this place my entire time in Paris. I might never learn to enjoy the world as a single individual.So I went out.Evening in Paris was light and warm.I strolled along a winding path,listening to birds sing,watching children float toy sailboats in a huge fountain.Paris was beautiful.And I was here alone but suddenly not lonely.My sense of accomplishment at overcoming my fear had left me feeling free,not abandoned. During my week's stay in Paris.I did everything there was to do,and it was the greatest week of my European vacation.I returned home a believer in the healing power of solitary travel.Traveling alone makes up for its problems by demanding self-reliance and building the kind of... Question: How did the two Parisians respond when the author turned to them? - They warmly offered her help. - They asked her to speak French. - They thought she should struggle to learn French. - They showed they were only willing to communicate in French.
They showed they were only willing to communicate in French.

Q: Read the following article and select the best answer. Article: Young people and older people do not always agree with each other. They sometimes have different ideas about living, working and playing. But in one special program in New York State, adults and teenagers live together in a friendly way. Each summer 200 teenagers and 50 adults live together for eight weeks as members of a special work group. Everyone works several hours each day. They do so not just to keep busy but to find meaning and enjoyment in work. Some teenagers work in the woods or on the farms near the village. Some learn to make things like tables and chairs and to build houses. The adults teach them these skills. There are several free hours each day. Weekends are free, too. During the free hours some of the teenagers learn photo-taking or painting. Others sit around and talk to sing. Each teenager chooses his own way to spend his free time. When people live together, rules are necessary. In this program the teenagers and the adults make the rules together. If someone breaks a rule, the problem goes before the whole group. They talk about it and ask, "Why did it happen? What should we do about it?" One of the teenagers has this to say about the experience: "You stop thinking only about yourself. You learn how to think about the group." Question: In one special program in New York State, young and older people _ . - are friendly to one another - teach one another new ways of building houses - live together but do not work together - spend 8 weeks together, working as farmers.
A: are friendly to one another

Read the following article and select the best answer. Article: Sir Edmund Hillary is best known for being the first, along with climbing partner Tenzing Norgay, to reach the top of Mount Everest . However, he also made many visits to Antarctica . In 1957, he led the first trip over ice to the South Pole. Hillary also helped his home country, New Zealand, build a research center on Antarctica, called Scott Base. He visited it in January 2007, when he was 87 years old. In the 1900s, many people like Hillary saw Antarctica as an exciting place. Scientists are interested in how glaciers flow and melt. They also worry that global warming is making glaciers melt faster. It has caused a 75 percent increase in ice loss in the last 10 years, according to a new study. Scientists say ice loss could cause water levels around the world to rise faster than expected. Ice is melting faster than expected because of global warming. Researchers in Antarctica are studying many other subjects too. Some use the cold weather and clear air as a way to study things that affect other parts of the globe. Antarctica has the cleanest air in the world. That allows scientists to compare the air there to the air in polluted places. Antarctica is the darkest place on earth, so it is a great place to study the stars. Some scientists are even studying penguin droppings . They have developed a new test to learn more about penguins' diets. Question: Which of the following is the best title for the passage? - Edmund Hillary - Antarctica--Best Place for Scientific Research - Global Warming - Studies on Antarctica
Studies on Antarctica