.Section_Warming Up & Reading PrereadingThere are a great many plants and animals that live under the sea. Do you know something about sea turtles? And how they live under the sea? Please read the following passage to get the answers.Sea turtles are sometimes referred to as “marine turtles”， referencing the fact that they have adapted to living primarily in the marine environment. All seven living species of sea turtles are endangered, and conservation efforts all over the world are attempting to prevent the extinction of sea turtles. The loss of sea turtles would not just be a blow to biodiversity: sea turtles are also important for the health of the worlds oceans.Like other turtles, sea turtles have a hard shell into which they can retreat. Their front legs have adapted into a flipperlike (鳍状的) form which allows them to swim rapidly and efficiently, and their bodies are slightly flattened to reduce resistance in the water. Some sea turtles can also use their flippers for climbing.The sea turtle has developed a respiratory (呼吸的) system which allows it to dive and stay underwater for as long as five minutes. Depending on the turtles level of activity and stress, it may need to surface soon for air. Sea turtles breathe in explosively, filling their lungs with enough air to supply them during dives.Sea turtles feed on other marine life and seagrass, a flowering plant which is widespread in the worlds oceans. They can be found in every ocean except the Arctic. Sea turtles are especially vulnerable (易受伤的) during egg laying, since many are slow and unhandy on land, and the eggs may be broken by careless walkers or viewed as a tasty snack by numerous predators. Once the eggs hatch, the young make their way to the ocean and begin their water life.The smallest sea turtles reach a length of around 30 inches, while the largest can exceed six feet. Sea turtles live for up to 80 years, and once they reach their maturity, they are difficult for predators to kill, thanks to their hard shells. They are easily vulnerable, however, to trawling and a variety of other human activities, along with changes in the marine environment such as coral bleaching (珊瑚白化) and nutrient pollution.Warming Up1.Match the pictures and the proper introductions.(1)_a mammal which lives in the sea and looks like a large fish with a pointed mouth, related to the whales but generally smaller(2)_a sea creature with a clear soft body and tentacles (触须；触角) that can sting you(3)_a sea plant like a garden plant with red, purple, or white flowers(4)_a large reptile (爬行动物) which has a thick shell covering its body(5)_a hard substance formed from the skeletons of very small sea animals. It is often used to make jewelry(6)_a type of small fish which appears to swim in an upright position and whose head looks a little like the head of horse(7)_a large animal with flippers, which eats fish and lives partly on land and partly in the sea, usually in cold parts of the world(8)_a very large mammal with the general shape of a fish and one or two blowholes for breathing答案：(1)(5)BEGAD(6)(8)CFH2Fill in the blanks according to the following pictures.(1)Killer whales are one of the top predators (食肉动物) in the sea. As a group, killer whales are known to eat fish, squid, seals, sea lions, penguins, even other whales.(2)Baleen whales have no teeth but instead have baleen plates with which the whales can filter the food out of the water.(3) Orcas are highly social animals that travel in groups called pods. Pods usually consist of 3 to 30 whales, and are led by females. Orca pods often work together to catch a meal.(4)On the top of the head, toothed whales have a single blowhole, the baleen whales have two blowholes, which open only when the whale takes a breath.(5)Whales share five common characteristics with other mammals.Whales breathe air into lungs.Whales have hair (although they have a lot less than land mammals, and have almost none as adults)Whales are warmblooded (they maintain a high body temperature)Whales give_birth_to their young.Whales feed their young with milk.Fast Reading1Read the text quickly and complete the main idea of it.The passage consists of two anecdotes written by Clancy. They are mainly about how Old Tom helped the whalers hunt_the_whale and saved_James_from_being_attacked_by_a_shark.2Skim the text and put the following sentences into a right order.(1)_AGeorge started beating the water with his oar.(2)_ BClancy grabbed his boots and raced after George to the boat.(3)_ CClancy arrived at the whaling station.(4)_ DThe killers started racing between our boat and the whale.(5)_ EClancy heard a loud noise coming from the bay.(6)_ FClancy was sorting out his accommodation.(7)_ GClancy ran