Read the article and select the best answer. Article: Most people have heard the sound of bees among flowers. Bees live almost everywhere in the world except in the Arctic areas. Many kinds of agriculture depend on these small, social insects. Without bees, fruit and nut growers as well as many other farmers would not have a crop. There are more than 20,000 kinds of bees. But only honey bees make enough honey for people to use. Honeybees are highly-organized social insects. They work together in a group, called a colony . Each colony lives in a hive . It contains one queen bee -- she lays all the eggs from which the members of the colony come. Each colony has only a few hundred males, called drones. The majority of all bees in a colony are workers, which are all females. Bees even have a special stomach, called a honey stomach, which is used to store sweet fluid that the bees gather from flowers. Bees also have long hairs on their body and legs. These hairs capture pollen as bees go from flower to flower. Some of the pollen is taken back to the hive. Some, however, is passed to the next flower. This is how many plants are fertilized. Pollen is the reproductive material of plants. Many important agricultural crops depend on bees for fertilization. Inside their hives, bees store sweet liquid from flowers and pollen as well. They may even gather sweet liquid from some other kinds of insects. These kinds of sweet liquid are also stored in the hive. Bees make honey through a process. They add liquid from their own mouths to sweet liquid into simple sugar. As the honey is stored, it dries. It becomes thicker and darker. Although bees are often thought of as honey makers, they provide a surprising number of products. Also, their greatest economic value is in fertilizing crops-not in making honey. Question: The passage is mainly about _ . Options: A: bees and their colony B: the way for bees to pass pollen C: bees and agriculture D: the process for bees to make honey
C

Read the article and select the best answer. Article: For some years the big drugmakers have been worrying about an approaching "patent cliff"--a fall in sales as the patents on their most popular pills expire or are struck down by legal challenges, with few new potential _ to take their place. This week the patent on the best-selling drug in history expired--Lipitor, an anti-cholesterol pill which earned Pfizer nearly $11 billion in revenues last year.In all, pill like Lipitor with a combined $170 billion in annual sales will go off-patent by the end of 2015. What is supposed to happen now is that lots of copycat firms rush in with "generic" (ie, chemically identical) versions of Lipitor at perhaps one-fifth of its price.Patients and health-care payers should reap the benefit.Pfizer's revenues should suffer. The same story will be repeated many times, as other best-selling drugs march over the patent cliff But generics makers may face delays getting their cheaper versions to market.Ranbaxy, a Japanese-owned drugmaker, struggled to get regulators' approval for its generic version of Lipitor, and only won it on the day the patent expired.More importantly, research-based drug firms are using a variety of tactics to make the patent cliff slope more gently. Jon Leibowitz, chairman of America's Federal Trade Commission (FTC), is concerned by drugmakers filing additional patents on their products to put off the day when their protection expires. Another tactic is "pay-for-delay", in which a drugmaker facing a legal challenge to its patent pays its would-be competitor to put off introducing its cheaper copy. In the year to October the FTC identified what it believes to be 28 such settlements. American and European regulators are looking into these deals. However, legal challenges against them have been delayed, and a bill to ban them is stuck in Congress. To encourage generics makers to challenge patents on drugs, and introduce cheaper copies, an American law passed in 1984 says that the first one to do so will get a 180-day exclusivity period,in which no other... Question: Pfizer exploit a loophole in the 1984 law mainly by _ . Options: A: marketing Lipitor more actively B: making the price of Lipitor go up C: cooperating with Watson to beat Ranbaxy D: encouraging Watson to produce cheaper copies
C

Read the article and select the best answer. Article: Listed here are four of the thousands of impressive museums around the world. The Guggenheim Museum Bilbao in Bilbao, Spain Built in 1997, the Guggenheim Museum Bilbao is one of the newest in the world. It has transformed the industrial city of Bilbao into a travelers' desired destination. The beautiful architecture of the museum has provided a dramatic background for movies and commercials. The Louvre in Paris, France Probably the most famous Louvre also holds the most famous painting in the world, the"Mona Lisa"by Leonardo da Vinci. Crowds can be found any day surrounding the small, but mysterious painting of the smiling woman. But, the Louvre is much more than a home to the"Mona Lisa". The Louvre is visited by more people each year than any other museum in the world. The Barnes Foundation in Philadelphia, America Just opened in its new downtown location in 2012, the Barnes Foundation is unique in that it is a completely reproduced display from one man's private collection. Dr. Albert C. Barnes started collecting art in the early 20th century and collected, among others, the largest number of original Renoir paintings in the world. The Uffizi Gallery in Florence, Italy Walking on the marbled floors feels like stepping back in time. The building itself is a beautiful palace-like structure with frescoes decorating the ceilings and walls. Viewers are bowled over by the works by Botticelli, such as"The Birth of Venus". Classic artworks from nearly 1,000 years ago describe religious events of the time. Question: What type of writing is this text? Options: A: An activity poster. B: An exhibition announcement. C: An art show review. D: A travel guide.
D