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1、9 Did you know that theres a kind of bird that can sew (缝制)? This called tailor bird uses its m_1_ as a needle. It sews 1_2_ together in the shape of a cup, then it adds a layer of straw to the inside of the cup and 1_3_ its eggs there. Each bird species(种类 ) builds its own special kind of nest. The
2、 most common materials used for nests are g_4_, branches and feathers. A bird must weave(编织) these materials into a nest. Just imagine building a house without cement (水泥) or nails to hold together. Another bird is called the weaver bird. The weaver bird builds a nest that looks like a basket, the n
3、est shaped like a pear with a hole in the middle. The hole is the door of the nest. A third bird is called the oven bird. The oven bird makes a nest that is very solid. The nest is made of mud. The oven bird forms the mud into the shape of an oven and then let it d_5_ in the sun. The sun b_6_ the mu
4、d making it very hard. Not all birds make their homes in branches. Some birds build their nests on the ground, while others bury their eggs u_7_ the ground. And some birds do not build nests at all. So when you look for nests and eggs in branches of the trees and bushes, remember that some nests may
5、 be right below your feet. 10 There was once a man in South America who had a parrot, a pet bird that could imitate (模仿) human speech. The parrot was unique (珍奇的 ). There was no other bird like him in the whole world. He could learn to say any word e_1_ one. He could not say the n_2_ of his native t
6、own, Ketunnel. The man did everything he could to teach the parrot to say Ketunnel, but he never s_3_. At first he was very gentle with the bird. But gradually , he lost his temper. “You s_4_ bird. Why cant you learn to say that one word? Say Ketunnel or I will kill you.“ But the parrot would not sa
7、y it. Many times the man screamed ( 尖声喊叫 ). “Say Ketunnel, or Ill kill you.“ But the bird would never r_5_ the name. Finally , the man gave up. He picked up the parrot and threw him into the chicken house. “You are even more foolish than the chickens.“ In the chicken house, there were four old chick
8、ens, waiting to be killed for Sundays d_6_. The next morning, when he went into the chicken house, the man opened the door. He was shocked by what he saw . He could not believe his eyes and ears. On the floor 1_7_ three dead chickens. The parrot was screaming at the fourth, “Say Ketunnel, or Ill kil
9、l you.“ 11 The red kangaroo is a famous Australian animal. It moves by jumping on its long hind (后面的 ) legs. Its long, heavy tail helps it keep its b_1_. If it is run after, a large kangaroo can reach a s_2_ of 40 kilometers an hour. One jump may be 8 meters long and up to 3 meters high. The red kan
10、garoo is found m_3_ in the dry grasslands of Australia. It usually travels in small groups. Each group has about 12 kangaroos. When a baby red kangaroo is born, it weighs only 28 grams! After being born, it crawls (爬行 ) through the mothers fur to her pouch (育儿袋 ). In hard times, the mother kangaroo
11、can s_4_ the baby from being born till there is enough grass for her to eat. The mother feeds the baby with milk from her body. The baby kangaroo will spend at least a year in the pouch. If a kangaroo is being run after and cannot run away, it will turn and f_5_. It will lean back on its tail and ki
12、ck with its hind legs. These legs are very, very s_6_ and have large claws (爪). The front legs are used to hold, not to box with, as you often see in cartoons. Kangaroos can live for up to 20 years. A kangaroo never stops growing bigger, so an old kangaroo can be very large. There are probably m_7_
13、of kangaroos of all types in Australia. They were a very important food for Aborigines (土著居民 ). 12 Can animals be made to work for people? Some s_1_ think that one day animals may be trained to do a number of simple jobs instead of people. They say that at a circus (马戏团 ), for example, we may see e_
14、2_, monkeys, dogs and other animals doing quite skillful things. P_3_ you have seen them on the television or in a film. Ifyou watch c_4_, you may find that the trainer always gives the animal some sugar or a piece of fruit as a reward (报酬). They say that many different animals may be trained to do
15、a lot of simple things if they know they will get a reward for doing that. Of course, as we know, dogs can be trained to look after a house, and soldiers in both old and modern times have used geese to give w_5_ by making a lot of noise when an e_6_ comes near. And also it may be p_7_ to train animals to work in families or factories. 13 If we observe carefully, we can find that most of the flowers in nature are red, orange and yellow. Ifwe have seen a black flower, its a c_1_ in a million. People have made a r_2_ to colors of more
