阅读下面短文,在空白处填入1个适当的单词或括号内单词的正确形式。Arctic foxes live on the land and sea ice within-组卷网

题型：语法填空-短文语填难度：0.65 引用次数：83 题号：12731297

阅读下面短文,在空白处填入1个适当的单词或括号内单词的正确形式。

Arctic foxes live on the land and sea ice within the Arctic Circle. Winter in the Arctic is unlike winter in most parts of the world. From October to February, the sun never rises to give 1 (warm)and light.

2 (luck), these small foxes have 3 (use)adaptation for living in the icy Arctic.Their thick fur coat keeps their body at a comfortable 104°F. Their long tails act like a blanket, 4 (keep)the Arctic foxes warm when they wrap the tails around their body to sleep. And their white coats make it difficult for predators(掠食动物) such as wolves and polar bears to find 5 (they) among the ice and snow.

When they don’t need 6 (avoid) predators or keep warm, Arctic foxes are 7 the hunt for food. They prefer to eat small rodents(啮齿动物), but when times are tough they 'll eat 8 they can find.

If an Arctic fox can't find food, or if the weather 9 (get) really bad, it can dig a snow hole and hunker down(蹲下) for up to two weeks. Once the animal can get out of its hole, it'll try to hunt again. With food in its belly, the Arctic fox has 10 better chance of making it through another long, dark winter.

20-21高二下·云南昆明·阶段练习查看更多[1]

更新时间：2021-04-15 19:39:56 |

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【知识点】动物

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文章大意：本文是一篇说明文。文章主要讲述了美国和加拿大的鸟类数量严重减少，其中一个主要原因是人类活动，并指出我们需要努力保护鸟类。

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Over the last 50 years, the U.S. and Canada have slowly but surely lost 29% of their bird populations. Even common birds such as sparrows and blackbirds 1 (face) declines in North America since 1970. One major cause is that humans have expanded their footprint greatly, 2 (result) in habitat loss for birds. Less habitat means less space 3 (find) food, mates, nest, and raise young. Since birds play an essential role in the functioning of the world’s ecosystems, we need spare no effort to protect them and take these beautiful creatures under our wing.

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Many animals migrate to find food, seek a partner, or in search of warmer weather, among 1 are the North American monarch butterflies. Every autumn, millions of monarch butterflies begin a long and difficult journey. They manage 2 (travel) around 4,000 kilometres south and find their way to places where they will spend the winter. A team of scientists 3 (lead) by Professor Eli Shlizerman has found out how the monarch is able to tell the time of day 4 uses its eyes to measure the position of the sun. These two pieces of information allow the butterfly to determine 5 way to go and the places where it will spend the winter. Its population 6 (crash) by as much as ninety per cent in the last few years. 7 (fortunate), people are destroying the natural environment by cutting down trees and 8 (use) chemicals that kill the plants that monarch caterpillars eat, so the number of monarch butterflies is falling. However, a better understanding of the monarch’s behavior has led to a greater 9 (aware) of this creature. People have been working together to record its migration and make sure that there are enough plants for it to feed on. The more we know about this delicate creature, the 10 (great) the chance it will survive.

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