Read More & Spend Less We have more than 7 million used books for sale, from the earliest board books to the all-time classics. If you like what we have to offer, Tell-a-Friend and we'll give you more reasons to read! Any member of our website who invites friends and family to try our books using the "Tell-a-Friend" program will see a 20% discount  when that friend places their first order within 14 days. Start exploring and save big on all your favorites. Here we list some of our books that are heavily discounted. Giraffes Can't Dance By Giles Andreae This book has been pleasing children for over 15 years. Gerald the tall giraffe would love to join in with the other animals at the Jungle Dance, but everyone knows that giraffes can't dance... or can they? 2004, Paperback ISBN:9780439539470 From $0.99 Laugh-Out-Loud Jokes for Kids By Rob Elliott With over 700,000 copies sold, this book will have children rolling on the floor with laughter. A great gift idea for any child. 2010, Paperback ISBN: 9780800788032 From $0.89 Love You Forever By Robert Munsch With simple text and pictures,Love You Foreveris a book to be shared--a story about love that children will carry with them throughout their lives. 1995, Hardback ISBN;9780099266891 FromY=1.98 How to Win Friends & Influence People By Dale Carnegie As the most famous confidence-building book ever published , this classic book will turn your relationships around and improve your relationships with everyone in your life. 2013, Paperback ISBN: 9788087888223 From $0.99 Who wrote the story about animals? A) Rob Elliott B) Giles Andreae C) Dale Carnegie D) Robert Munsch
B

Sometimes successful health campaigns can have quite unexpected reactions. The years of warnings about skin cancer mean that Britons are happy to cover themselves in sunscreen or stay out of the sun altogether, but it also means that most of us are not getting enough vitamin D. Scientists announced yesterday that Britons need to increase to three times the amount of vitamin D they get per day. They called on food producers to fortify their products with more of the vitamin and suggested people should consider taking supplements  to keep levels up. They also suggested getting out in the sun for short periods more often, but they warned against "sun bingeing". The government does not publish official advice on the amount of vitamin D people should take due to a lack of research, says Dr Birgit Teucher of the Institute for Food Research. But in the US, the government recommends 5 micrograms a day. By that count, Dr Birgit Teucher said that around 90% of Britons between 19 and 64 would be lacking in the vitamin because they only took around 3 micrograms a day. Vitamin D is important for absorption of calcium by the body, which is needed for healthy teeth and bones. A lack of it can lead to serious diseases in both children and adults. The vitamin can be found in some foods but it can also be obtained from chemicals in the skin reacting to sunlight. Dr Barbara Boucher said adults should get 5 to 25 micrograms a day. Shortage of vitamin D may be linked to diseases such as muscle weakness, high blood pressure and rickets . Dr Birgit Teucher gave several reasons for the lack among Britons. Increasing numbers of office-based jobs mean a lack of exposure to the sun; and the rise of becoming overweight means that vitamin D--which is fat soluble is increasingly stored in body fat, where it cannot be accessed readily. Professor Brian Wharton of the Institute of Child Health said that children in particular needed to have enough vitamin D to prevent rickets. Professor Graham Bentham, an environmental scientist at the... From the passage, we can conclude  _  . A) the babies who were only breast--fed certainly need to take vitamin D supplements B) a large quantity of vitamin D stored in body fat is the primary reason for being overweight C) the sunlight can produce adequate vitamin D that the body needs all year round D) vitamin D is vital for the body to absorb calcium needed for healthy teeth and bones
D

What's the difference between the British Isles, Britain, the United Kingdom and England? The British Isles is made up of two large islands: One is called Ireland and the other Britain. Britain, or Great Britain, is the larger of these two islands and it is divided into three parts: Scotland, Wales and England. The United Kingdom (UK) is short for the United Kingdom of Great Britain and Northern Ireland. It is made up of Scotland, Wales, and England (i.e. the whole of Britain), and also about one-sixth of Ireland, the Northern part. The rest of Ireland is self-governing . England is the largest, most populous  , and generally speaking, the richest section. English people often use the words "England" and "English" when they mean "Britain" and "British". This sometimes makes the Scots and the Welsh angry. The Scots are very proud of their separate nationality. The Welsh too do not consider themselves as England, and have a culture and even a language of their own. Ireland became part of the United Kingdom in 1801, but is soon grew discontented  , and for forty years the "Irish Question" was the greatest headache of British Parliament . At last, Ireland divided itself into two: Northern Ireland remained loyal  to the Crown , and in 1922 the rest of the country broke away to form Irish Free State, now the Republic of Ireland. Which is the largest island of the British Isles?. A) Ireland B) Britain C) England D) Northern Ireland
B

A blue hole is a flooded sea cave with a hole that opens up at the land's surface. These cave systems form in carbonate rock, often on islands. Some blue holes have very special rock formations and water chemistry. Far below sea level, they contain some of the harshest environments on Earth, with no oxygen and no light. Yet these areas are filled with life forms that have adapted to the extreme conditions. Information gathered from these blue holes is helping scientists to increase their understanding of biology, archaeology and geology. But exploring these blue hole environments brings danger as well as discovery.  Blue holes get their name from the color1 some have when seen from the air. The color1 is usually a reflection of the sky on the water. But not all of these cave systems have blue surfaces. Some contain dark or muddy water. Blue holes are the result of erosion in which water breaks down rock. Rain falling thousands of years ago contained chemicals which slowly wore away at the limestone landmass. These holes were later filled with sea water as the sea level changed. The rising and falling of sea levels and the mixture of salt and fresh water further wore away at these cave formations. Blue holes are vertical caves. But they can also have horizontal cave formations that may be hundreds of meters long.  These flooded cave systems can be found in the ocean, or they can be found inland. Ocean caves are affected by tides, so they always have water movement. But blue holes on land are very still. They have several layers of water, chemicals, and bacteria. The top layer of fresh water comes from rainfall. This layer acts like a cap on top of the layered mixture, and keeps out oxygen from the atmosphere. The fresh water floats on a denser layer of saltwater. Underneath this is a layer of poisonous hydrogen sulfide, produced by bacteria living in the water. Underneath this layer is anoxic seawater -- water that does not contain any oxygen.  Underwater caves are probably one of the least explored ecosystems... It can be inferred front the passage that  _  . A) quantities of advanced life forms exist in blue boles B) blue holes are not fully explored due to their low value C) blue holes are vertical caves because of strong currents D) the chemicals in the rain lead to the formation of blue caves

D