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　　Monarch butterflies, the large origin black insects, are common summer sights in northern United States and Canada. They brighten in parks and gardens as they fly among the flowers. What makes monarch butterflies particularly interesting is they migrate, all the way to California or Mexico in back. They are thought to be the only insect that does this. Every year in the late summer, monarch begin their migration to the south, those heading for Mexico go first for the Louisiana Mississippi region. And then they fly to go across Mexico into Texas. Once in Mexico, they establish themselves in one of about 15 sizes in the mountain forth. Each side provides the winter home for millions of monarchs. The butterflies are so numerous that they often cover the entire trees. When spring comes, they began their long journey north. The question is often asked whether every butterfly makes the round trip journey every year. And the answer is no. The average monarch lives about nine month. So when fly the north, they might lay eggs in Louisiana and die. The eggs of that following generation may be found in Kentucky, the eggs of next generation may be in the Kang Michigan. The last generation of the season about the forth may make the journey back in Mexico and restart the cycle. Scientists learn about the monarch butterflies’ migration by capturing and placing the identifying tags in the insects. By recapturing the attempt of the monarch and noting where they came from, the next scientist can figure out things like butterfly’s age and its routing

　　Question 19 to 22

　　19. what is the unique about the monarch butterfly according to the speaker?

　　20. where does the butterfly settle at the end of the migration?

　　21. what does the speaker say about the monarch butterflies’ reproduction?

　　22. what is the talk mainly about ?

　　People nowadays seem to have the sense that their time has become more limited. Compared with early generations we spend more and more time working and have less and less free time to engage in leisure pursues. But this premise turns out to be an illusion. the most comprehensive data from major Time Use Service suggests, if anything, Americans today have more free time than the early generations. The number of hours we work has not changed much, but we spend less time now on home tasks. So we have a great amount of time for leisure than in decades past. so why do we feel like time so scare. One problem is that time becomes more valuable and time becomes more worth money. we feel like we have less of it. workers who bill or get paid by the hour, think employer and fast-food workers, report focusing more on pursuing more money than those who get paid by salary and the fact has been fast. In one experiment, people were told to play the role of consultant and bill their time by either nine dollars an hour or ninety dollars an hour. When people billed their time by ninety dollars an hour they report feeling far more priced for time. Thinking about our time as money, changes are our behavior as well. in one study, people who were instructed to think about money before entering a cafe spent less times chatting with the other patrons and more time working. Those who are thinking their time did reverse spending time socializing instead of working.

　　Question 23 to 25

　　23. what does the speaker say now people feel about time?

　　24. what do the data from time use service show?

　　25. what happen when we think our time about our as money?

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