The following are introductions to some programs that BBC I will show on TV.

根据短文内容，选择最佳答案，并将选定答案的字母标号填在题前括号内。

    Danielle Steel, America's sweetheart, is one of the hardest working women in the book business. Unlike other productive authors who write one book at a time, she can work on up to five. Her research before writing takes at least three years. Once she has fully studied her subjects, ready to dive into the book, she can spend twenty hours nonstop at her desk.

    Danielle Steel comes from New York and was sent to France for her education. After graduation, she worked in the public relations and advertising industries. Later she started a job as a writer which she was best fit for. Her achievements are unbelievable: 390 million copies of books in print, nearly fifty New York Times best-selling novels, and a series of “Max and Martha” picture books for children to help them deal with the real-life problems of death, new babies and new schools. Her 1998 book about the death of her work shot to the top of the New York Times best-selling list as soon as it came out. Twenty-eight of her books had been made into films. She is listed in the Guinness Book of World Records for one of her books being the Times best-seller for 381 weeks straight.

    Not satisfied with a big house, a loving family, and a view of the Golden GateBridge, Danielle Steel considers her readers to be the most important resource and has kept in touch with them by e-mail. While she is often compared to the heroines of her own invention, her life is undoubtedly much quieter. But, if she does have anything in common with them, it is her strength of will and her inimitable (独特的) style. There is only one Danielle Steel.

    It's a big world out there, and there's not nearly enough time to see it all in a lifetime. Wherever you're going, the key to a great travelling experience is preparation and information. So whether you're heading off on a short package tour or planning a “round-the-world” adventure, it includes working out how much you have to spend, where you'll stay, who you'll travel with and any documents（证件）you'll need. We can help you so you can soon be on your way to that great trip.

A backpacker's survival guide

    Backpacking, it seems, has never been hotter. Young people everywhere are longing to experience backpacking and the adventure that is independent travel.

Tips for affordable overseas travel

    Looking forward to experiencing the fun and excitement of an overseas trip? Overseas travel doesn't have to be expensive. You'll still need to do some serious saving. But with some careful research, planning and budgeting, you can make it. Find out about budget travel, working holidays and discount travel cards to make travel affordable.

Getting around overseas

    Once you've reached your overseas destinations（目的地）, you can often choose a way of getting around to suit the sort of travel experience you want, your available time and your budget.

Staying safe overseas

    Looking after your health and well-being when you travel overseas is kind of a no-brainer. You can't travel if you get sick or injured and you certainly don't want your long-awaited trip ruined because of an avoidable illness or accident.

Planning your trip

    Any overseas travel needs some well-considered planning. These days you can do loads of research via the Internet. Our list of sites at the end of this article will help get you started. Once you get started, researching and planning your trip is almost as fun as actually taking it.

    Imagine being a business that regularly takes huge quantities of your own products worth millions of pounds and burns them up. Your stock literally goes up in smoke. It sounds crazy, but the practice is common for some of the world's biggest clothing manufacturers. They argue that it is the most cost-effective way of maintaining their brand's exclusivity (独特性).

    The clothes that are burned are those that do not sell at a high enough price. Rather than watch them go on sale, the companies would set fire to them and regain a small amount of energy.

    Nobody knows exactly how much unsold stock is burnt annually by those fashion houses, but burning clothes has various negative impacts on the environment. For example, burning clothes made from artificial fibers may release plastic microfibers into the atmosphere, which worsens global warming. A U.K. parliamentary committee report on sustainability and the fashion industry advises the government to ban the burning of unsold stock if it can be reused or recycled.

    Actually, there are other approaches. What if those companies had a section tasked with taking back unsold clothes, redesigning them into new products, and shipping out the new products to the market once again?

    There is also now an opportunity to focus on biodegradable (可生物降解的)fabrics. Clothes that break down faster might not have to be burned. They would also appeal to those who care about the environmental impact of their own wardrobes.

    Additionally, we have an over-production problem. According to the World Bank, while clothing sales have risen steadily since 2000, clothing utilization has fallen at roughly the same rate. For every extra T-shirt that is sold, it will be worn roughly half as much as it would have been 20 years ago. That means better forecasting market trends would in theory result in less waste.

    Burning clothes won't happen simply through fashion firms. The scale of fashion production has to change. And it's important to recognize that these consumer-focused brands will only go where the market takes them. If protecting the environment really matters to the public, they have to make clear that they want more sustainable clothing in the first place. Without consumers demanding that, it won't change.

    Science Advances published a new research report, saying bees are capable of addition and subtraction (减法)in Arithmetic(算术) learning—using colors in the place of plus and minus symbols.

    It isn't unusual to see the ability to count—or at least distinguish between differing quantities in the animal kingdom—Such ability has been seen in frogs, spiders, and even fish. But solving equations (方程式) using symbols is rare, so far only achieved by famously brainy animals such as chimpanzees. The previous research says the social insects, ants, can count to four and understand the concept of zero and researchers wanted to test the limits of what their tiny brains can do.

    The experiment goes like this. Scientists trained 14 bees to link the colors blue and yellow to addition and subtraction, respectively. They put the bees at the entrance of a Y-shaped maze (迷宫), where they were shown several shapes in either yellow or blue. If the shapes were blue, bees got a reward if they went to the end of the maze with one more blue shape (the other end had one less blue shape); if the shapes were yellow, they got a reward if they went to the end of the maze with one less yellow shape.

    The testing worked the same way: Bees that "subtracted" one shape when they saw yellow, or "added" one shape when they saw blue were considered to have aced the test. The bees got the right answer 63% to 72% of the time, depending on the type of equation and the direction of the right answer—much better than random guesses would allow.

    While the results came from just 14 bees, researchers say the advance is exciting. If a brain about 20,000 times smaller than ours can perform maths using symbols, it could pave the way to novel methods in artificial intelligence (AI) and machine learning. Just don't ask the bees to do your homework anytime soon.