Read the following article and select the best answer. Article: Have you ever looked toward the sky on a fall day and witnessed a group of migrating birds? If so, you probably noted the V-shaped formation of the birds or the birds flying in a ball-like formation. Why do birds fly this way? Many theories have been developed to explain the formation patterns of different types of birds. One theory is that birds fly in certain formations to take advantage of the laws of nature. The birds know that flying in a V-shaped pattern will save energy. Like the lead cyclist in a race who decreases wind force for the cyclists who follow, the lead bird cuts wind force for the birds that follow. This decrease in wind force means that the birds use up to 70 percent less energy during their flight. When the lead bird becomes tired, a more rested bird takes over that position. But saving energy is important for more than one reason. Sometimes food is short during migration flights. Keeping energy enables the birds to fly longer distances between meals. When food is sighted, the birds guide one another in a different way. When a bird identifies a familiar feeding area, it might turn around in order to signal the group to change direction. Then, this bird becomes the new leader. It helps guarantee that other birds will know exactly where it is going. Then the whole group makes a change in direction, gently streaming from the sky down to the ground. This formation is like an arrow pointing to the location of food. Scientists have also studied the birds that sometimes fly in a ball-like formation. Researchers believe that the birds come together if a predator is spotted. The predator may then become impatient waiting for a single bird to fly away from the group. The birds will often dip and dive as a group, frustrating even the most persistent enemy. Scientists report that this is a very effective method of defense against an attack. The birds care for their fellow fliers through teamwork. As transportation expert Henry Ford once said, "If everyone is moving forward together, then... Question: Which is the best title for the passage? - A Bird's-Eye View of Teamwork. - Success Takes Care of Itself. - The Strongest Will Survive. - A Science Behind Flying.
A Bird's-Eye View of Teamwork.

Read the following article and select the best answer. Article: Some people will do just about anything to save money. And I am one of them. Take my family's last vacation. It was my six-year-old son's winter break form school, and we were heading home from Fort Lauderdale after a weeklong trip. The flight was overbooked, and Delta, the airline, offered us $400 per person in credits to give up our seats and leave the next day. I had meeting in New York,So I had to get back . But that didn't mean my husband and my son couldn't stay. I took my nine-month-old and took off for home. The next day my husband and son were offered more credits to take an even later flight. Yes, I encouragedokay, ordered-them to wait it out at the airport, to "earn" more Delta Dollars. Our total take: $1,600. Not bad, huh? Now some people may think I'm a bad mother and not such a great wife either. But as a big-time bargain hunter, I know the value of a dollar. And these days, a good deal is something few of us can afford to pass up. I've made living looking for the best deals and exposing the worst tricks . I have been the consumer reporter of NBC's Today show for over a decade. I have written a couple of books including one titled Tricks of the Trade: A Consumer Survival Guide. And I really do what I believe in. I tell you this because there is no shame in getting your money's worth. I'm also tightfisted when it comes to shoes, clothes for my children, and expensive restaurants. But I wouldn't hesitate to spend on a good haircut. It keeps its longer, and it's the first thing people notice. And I will also spend on a classic piece of furniture. Quality lasts. Question: What can we learn about the author? - She rarely misses a good deal. - She seldom makes a compromise. - She is very strict with her children - She is interested in cheap products.
She rarely misses a good deal.

Read the following article and select the best answer. Article: The rising sea waters caused by global warming have inspired a Russian architect to design a hotel that could be built on water as well as land.The eco-friendly "Ark" could be constructed in just a few months anywhere in the world, the designer says. It's called "The Ark",but looks more like a ship sitting upside down on the water.A new design by Russian architect A1exander Remizov challenges the tradition of land-based hotel and would provide a shelter in the future--should the world face a modern-day flood as described in the Bible. The building of the hotel could be fast and simple."Prefabricated section could be put together in three to four months," Remizov said. The versatile structure could be constructed in most corners of the earth, even in earthquake-prone areas.Constructing "The Ark"--which would include 14 000 square meters of living space---would cost roughly the same as building an energy-efficient house. The self-supporting structure would be built around a central post, connecting wind generators and heat pumps on its roof with the basement,where solar,wind,and thermal energy could be stored and turned into electricity. Remizov has designed the building without glass,choosing instead the lasting and self-cleaning foil that could defend itself against rough weather conditions.That foil would be fastened to metals,which would also collect rainwater.The building would also feature an indoor jungle, creating its microclimate. Question: Which of the following might be the shortest time to make the parts of "The Ark"? - 14 months. - 3 months. - 4 months. - 7 months.
3 months.