Canada is one of the few nations in the world to have two official languages：English and French. There are 10 provinces in the country but only one of these—Quebec is known as "French Canada". This is because it was founded by French explorers while British adventurers discovered the rest.

    Canada left the Britain in 1867 to become an independent country, and English and French have been recognized as the official languages ever since.

    Most people speak English as their first language and the two national television networks broadcast in English throughout the country. Apart from in Quebec and a few places on the east coast, French television is very rare.

    The same goes for traffic signs and menus, for example. Outside of Quebec, there are only a few places where you'll see traffic signs in French. In restaurants, it's almost impossible to find French on the menu unless you are in the heartland of French Canada. However, all products sold in Canada must, by law, have labels（标签）and instructions in both languages.

    In Canada's English speaking provinces, official bilingualism（双语）means that students can choose to complete a special French language course. Under this programme, they are taught most of their subjects in French. If a student begins the course in kindergarten（幼儿园）or Grade One, it is likely that all their lessons will be in French. However, if they start at junior high school, 25 per cent of the teaching will continue to be in English.

    Easter Island's large and mysterious stone statues（雕像） have made it world famous. These statues, whose likenesses look like humans with huge stone cylinders(柱状物) balancing on their heads like hats, have tourists coming from all over the world. The tourists come to see these works of ancient art carved by the early inhabitants of the island. They come to see the mystery that has puzzled historians for decades.

    Easter Island is located in a remote part of the South Pacific Ocean about 2,300 miles west of Chile. Easter Island covers just 45 square miles and its Polynesian name is Rapa Nui.

    On Easter Sunday 1722, a Dutch explorer named Jacob Roggeveen was the first European to see Easter Island. The early Polynesians carved the statues within the holes of the volcano using only stone tools. Then they moved these huge statues to various destinations throughout the island. These 600 statues range in height from 10 to 40 feet. Some of them weigh as much as 50 tons. How could the early Polynesians lift hundreds of heavy statues out of the volcano? How did they move them across the island to their various locations? All of these questions, as well as many others, remain unanswered.

    The early islanders probably worshiped(崇拜) these eyeless giants until sometime around 1670. In 1680, a war broke out between two groups of islanders. The victors of the war and ancestors of the present inhabitants, broke down many of the statues. In most cases, they broke the necks of the statues.

    Now 15 of the statues on Easter Island have been repaired to their original positions on their stone platforms. Even today, using modern tools and machinery, putting up such large statues and balancing cylinders on top of their heads presents a challenging task.

    One second-grade student wanted to help erase school lunch debt for her fellow students, so she decided to create lemonade stands to raise funds（资金）.

    Amiah Van Hill was inspired to raise funds to help pay off her classmates' lunch debt back in May after reading about Jeffery Lew. The father of three crowd-funded to cover the cost of unpaid lunches in the Seattle School District, where his 8-year-old son took part. “She's a really strong reader, so she read the story and said, 'Wow, this is great! I wonder if there's any kids at my school that need help paying their lunches,'” said her mother, Rachel Van Hill.

    Amiah, 6, and Aria, 4, discovered that at Hayden Meadows Elementary School in Idaho, the unpaid lunch debt was $40.55. They set up a lemonade stand last month to raise the money, with a sign reading, “Lemonade 4 Lunch.” During their first set-up, the two met their goal within an hour.

    The school was very much appreciative. Principal Lisa Pica said “Our school believes in giving back to the community and we are excited that Amiah has got that value at such a young age and we are so proud that she has found a way to help those in need. She is a very special little lady.”

    After discovering it was “easy” to pay off one school's debt, they set up another lemonade stand a week later to raise money for two more local schools. The girls then decided to set their sights higher and raise funds for the entire Coeur d'Alene Public School district. In 22 days, they've raised more than $2,700. The school district is excited to recognize her for her good deed.

    The insects are important to farmers. When a honeybee lands on a flower in plant, pollen (花粉) sticks to its legs. When the bee lands on another flower, some of the pollen falls off and fertilizes the second plant.

    The act of spreading pollen is responsible for many fruits, vegetables, nuts and other crops. Yet about 30 percent of honeybees in the United States and other areas have died in recent years.

    Mike Leggett is a researcher at the University of Maryland. He wants to learn why so many bees are dying. “The number of colonies (蜂群) that die every winter has been one in three. So on average 30 percent of the colonies have died every winter over the last six winters. And that's a huge number.” His research team examined the pollen that honeybees carried to their homes. They found that the pollen contained high levels of 35 different pesticides (杀虫剂), which are chemicals used to protect plants. “Pesticides are used, and have been used, pretty widely, for centuries, to protect plants from diseases,” says Mr Leggett.

    Keith Oh linger, a farmer and beekeeper in Maryland, has watched many of his bees die every winter. Mr Ohlinger thinks widespread bee death is caused by several things happening at once. But he does not feel sure that pesticides are a part of the problem, “I felt it was the result of a lot of little things. I didn't feel that there was probably one smoking gun. But there's a division (分歧) there, some people feel that it is just one thing.”

    Honeybees are important to agriculture. This makes the search for an answer to their death very important for Mr Leggett's team. As he knows, one in every three bites of food we eat is somehow pollinated by honeybees.

    "You're going to the doctor," your mum tells you. But why go to the doctor when you're not sick? Regular checkups (健康检查) are a good idea for kids. These visits happen when you're feeling fine and are sometimes called "well-child" visits because you're well.

    It's a chance for the doctor to see that you're growing and developing normally. It's also a chance for your parents to talk with the doctor about any issues, such as safety or nutrition, so they can help you stay healthy. And it gives you a chance to ask any question you might have about your health. You might wonder when you will grow taller, for example, or if you weigh the right amount.

    A checkup may start when a nurse calls you and your parents from the waiting room. He or she might start by checking your weight and height, as well as your blood pressure and maybe your temperature.

    Blood pressure: This shows how hard your heart is pumping blood throughout your body.

    Body temperature: Using a thermometer, the nurse can find out if your temperature is in the normal range. If it is higher, it means that you have a fever and your body is working to fight off an infection (感染).

    The nurse may check your hearing and vision. If you have trouble with either one of these, you might need to see a hearing expert or an eye doctor. Urine (尿) can tell whether something is wrong with the way a person's body is working.

    All of these numbers, measurements, and test results will go into your medical record, so the doctor can look them over. Then it's time to meet the doctor.