Read the following article and select the best answer. Article: Many birds migrate. This means that every year they fly somewhere warm in the winter and then return to the place they came from in the spring. One mystery is how birds know how to travel such long distances without getting lost. Scientists have wondered for years whether they are born with the knowledge of where to go or whether they learn it after they are born. Now, researchers have found evidence that shows that one type of bird, at least, learns how to migrate. The bird is the whooping crane , a tall, white bird that lives in the United States. In the 1940s, the number of these birds decreased to fewer than 25 individuals, and many people feared that they would die out. Thanks to efforts to save them, they have now increased to about 600. However, the birds are not very good at taking care of their young. Because of this, eggs are brought to a site in Maryland. There, scientists from the Whooping Crane Eastern Partnership raise the baby birds. Later, the young birds are taken from Maryland to Wisconsin, where the scientists teach them how to fly. From there, they fly about 2,200 kilometers south to Florida to spend the winter. The first time, scientists lead the way in a small airplane. From the second year, though, the birds travel by themselves. For 14 years, the scientists have kept a careful record of every flight the birds have taken between Wisconsin and Florida. They have also recorded which birds fly together, the relationships between the birds, and the gender of each bird. When scientists analyzed the data, they were surprised by the results. These showed that each bird took a very different route. However, as they got older, they flew more and more directly between Wisconsin and Florida. This continued until they were five years old. This indicates that the birds gradually learned the best route to take. Moreover, when an older bird was in a group, the whole group flew more directly. This suggests that the older birds taught the younger ones a quicker route. Scientists say that this evidence... Question: What do we learn from the data? - Most birds like to visit new places when migrating. - Most birds stop flying to Florida when they are five years old. - Younger birds prefer not to fly together with older birds. - Younger birds are able to gain an important skill from older ones.
Younger birds are able to gain an important skill from older ones.

Read the following article and select the best answer. Article: For more than six million American children, coming home after school means coming home to an empty house. Some deal with the situation by watching TV. Some may hide. But all of them have something in common. They spend part of each day alone. They are called latchkey children. They're children who look after themselves while their parents work. And their bad condition has become a subject of concern. Lynette Long was once the headmaster of an elementary school. She said, "We had a school rule against wearing jewelry. A lot of kids had chains around their necks with keys attached. I was constantly telling them to put them inside shirts. There were so many keys, it never came to my mind what they meant." Slowly, she learned they were house keys. She and her husband began talking to the children who had them. They learned of the impact working couples and single parents were having on their children. Fear is the biggest problem faced by children at home alone. One in each three latchkey children the Longs talked to reported being scared. Many had nightmares and were worried about their own safety. The most common way latchkey children deal with their fears is by hiding. It might be in a shower stall, under a bed in a closet. The second is TV. They'll often play it at high volume. It's hard to get statistics on latchkey children, the Longs learned. Most parents are slow to admit they leave their children alone. Question: The main idea about "latchkey children" is that they _ . - are growing in numbers - are also found in middle-class neighborhoods - watch too much television during the day - suffer problems from being left alone
suffer problems from being left alone

Read the following article and select the best answer. Article: The Outdoor Centre Opening times Water sports: 10 a.m. -- 6 p.m. Play Park: 10 a.m. -- 5:30 p.m. Windsurfing -- One-day course Beginner windsurfing courses are offered on Saturdays and Sundays when the weather is good enough. Learning to windsurf is a lot of fun. The excitement when you sail across the water for the first time is not easily forgotten. Boards with small sails are available for beginners. Course fee: PS32 for adults; PS16 for children under 16 (this includes all equipment) One-day adventure course This is the opportunity you have been waiting for. Come and try sailing, climbing, surfing and archery . This course is intended to introduce outdoor activities to adults in a fun and leisurely manner. You do not need to be very fit or to have previous experience with the activities. All you need is to be interested. Course fee: PS22.50 Play Park The Play Park is suitable for children from two to ten years of age. It is one of the best of its type in the country. It has sand and water playgrounds, slides, large pool balls, a play castle and much, much more. Next year the center will open Play Palace and Play Ship. Summer adventure holidays Sailing, Climbing, Windsurfing, Fun Games Fee: PS50 for adults; PS30 for children under 16 Statement: Safety is of primary importance at the Outdoor Center. All staff members are fully trained in first aid, and qualified to teach the activities on offer. We also make sure that all children only take part in activities that are suitable for their ages and physical abilities. For this programme children must be able to swim 25 metres and be in good physical health. Question: Of the four programs, which one is open only on weekends? - Windsurfing -- One-day course - One-day adventure course - Play Park - Summer adventure holidays
Windsurfing -- One-day course