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题型:听力题 题类:常考题 难易度:容易

外研版高中英语必修一Unit 5 听力专练【教材话题】

Listen to the passage and fill in the missing words.

At certain times of the year, we can see many animals move from one place to . This movement migration. They migrate 3. food, a partner or to search for weather. Every fall, millions of beautiful monarch begin the journey. They manage to travel a long distance to the places they will spend the winter. Scientists find the monarch is able to tell time of day. It then uses eyes to measure the position of the sun. But the population of them in the last few years. The more we know them, the greater the chance they will survive.

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