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Read the article and select the best answer. Article: Orcas, or killer whales, are the largest of the dolphins and one of the world's most powerful animals feeding on meat. They feast on marine mammals such as seals, sea lions, and even whales, employing teeth that can be four inches (ten centimeters) long. They are known to grab seals right off the ice. They also eat fish, squid , and seabirds. Though they often frequent cold, coastal waters, orcas can be found from the polar regions to the Equator . Killer whales hunt in deadly groups, family groups of up to 40 individuals. There appear to be both permanent and temporary group populations of killer whales. These different groups may hunt different animals and use different techniques to catch them. Permanent groups tend to prefer fish, while temporary groups target marine mammals. All groups use effective, cooperative hunting techniques that some are similar to the behavior of wolf packs. Whales make a wide variety of communicative sounds, and each group has various noises that its members will recognize even at a distance. They use echolocation to communicate and hunt, making sounds that travel underwater until they meet objects, then reflect back, showing their location, size, and shape. Killer whales are protective of their young, and other adolescent females often assist the mother in caring for them. Mothers give birth every three to ten years, after a 17-month pregnancy. Killer whales are immediately recognizable by their special black-and-white coloring and are the intelligent, trainable stars of many aquarium shows. Killer whales have never been widely hunted by humans. Question: Killer Whales do not feed on _ . Options: A: seabirds B: seals C: fishes D: seaweeds
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D

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Read the article and select the best answer. Article: You've probably heard of Marco Polo, but how much do you actually know about him and his incredible journey? Marco was the original travel writer, whose trade contacts with Asia changed Europe, opening it up to new ideas and cultures. Marco Polo was born in the Venetian Republic around 1254.At the time, Venice was one of the most powerful trading cities in the world, and was ruled as an independent city state.Marco's mother died when he was young, so he was brought up by his aunt and uncle.When Marco was born, his brother (Maffeo) and father (Niccolo), who were successful merchants, were away on a trading voyage.They didn't get back until Marco was about 15. In 1271, Niccolo and Maffeo set off again for Asia, this time taking Marco with them.On a previous journey they'd met Kublai Khan (the Yuan Dynasty), and they were keen to establish trade links between Kublai's empire and Venice.The Polos sailed across the Mediterranean to Acre (now in northern Israel).Then, they traveled by camel to the port of Hormuz in the Persian Gulf.Their plan was to sail to China but they couldn't find any good boats.So, they continued the journey overland, finally meeting Kublai Khan at his summer palace in Xanadu, about 275 kms north of modern Beijing.Marco was now probably 21 years ol The journey had taken over three years. The Polos had learnt a great deal about the world during their travels and so Kublai employed Marco as a government official.This gave Marco the opportunity to travel around much of Kublai's empire in China.In fact, Kublai found the Polos so useful that he was unwilling to let them return home.However, in 1292, the Polos eventually left, sailing from China and ending up in Hormuz again.The journey was extremely dangerous: of the 600 travelers who set off, only 18 arrived in Hormuz, including all three of the Polo family. The Polos finally returned to Venice in 1295, twenty-four years after setting off.They had traveled 24,000 kms.By this time Venice was at war with Genoa, its trade rival.Unfortunately for... Question: The passage is most probably taken from _ . Options: A: a newspaper B: a geography book C: a history book D: a traveler's guide
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C

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Read the article and select the best answer. Article: Question: I have a one-year-old female bulldog, who has recently taken to biting my shoes when we are in the park and I'm on the mobile. She can be slightly aggressive and I'm starting to get worried and a bit annoyed. How do I stop her? ----Susan, London. Answer: You need to get this problem under control before it could escalate . I always advise owners not to talk on the mobile phone when they go for a walk with their dogs, because they should be focusing on this time with their pets, but I know people have busy lives and need to make phone calls. The behavior she is showing is either controlling or playfulness, but they both result from the same issue ---- you are not paying attention to her. If you must make phone calls while on a walk, try to still engage with your dog by speaking towards her, playing some sorts of game and so on. If that doesn't work, you'll have to try more of a training approach. You will need a training line and some treats. Start your walk in the usual way, make a phone call, and when your dog starts displaying the undesired behavior, simply stop walking --- otherwise she will see it as a game. When she is calm and looking at you, or if she sits, give her a treat; then continue walking. If she starts up again, pick up the lead, gently pull it, and tell her "no". Then ask her to sit and give her a treat if she does. The aim of this is to try to get her to forget how much fun it is biting your shoes. Do little sessions every day --- and try not to answer the phone if you know it's going to be a long conversation. Be patient and good luck! Remember that if an animal shows signs of distress or discomfort, an early visit to the vet is always recommended. Question: What is Susan complaining about in her question? Options: A: She doesn't know how to make phone calls while walking a dog. B: She has no idea how to get along well with her dog. C: She gets worried that her dog is getting annoyed. D: She finds her dog is getting a little aggressive.
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D