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六级练习2011.09.28


       
       




There are thousand of pigeons in any big city in the world. (1) __________________________________? Just how pigeons find their way home is a bit of mystery. Some people think that they use landmarks that is the pigeon knows what the land is like from the air and it uses this like a map. (2) _______________________________________, which can easily be seen from a long way off. Other possibilities are that pigeon use the position of the sun to work out directions or that they have some kind of built in compass. (3) ____________________________________ but they still aren't to sure how pigeons find their way home. It seems likely however that pigeons like airline pilot use a number of different methods to guide them on their long distance journeys. Perhaps, one day we'll learn their secret.


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1)But did you know that this common bird is apple to find is way home from even hundreds of kilometers away
2)a landmark silly ,for example is it open-house
3)For quite a few years now. Scientists have been carrying out experiments on homing pigeons
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<1>But you know that these common birds are able to find its way home from even hundred
climing away.
<2>It's landmark like simi for example,if offer help
<3>For quite few years now,scientists had carrying out expenrienceson pigeons
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1.But did you know that this common bird is easy to find their way home from even hundreds of kilometers away?
2.A landmark of Sydney,for example,is the opera house,
3.For quite a few years now,scientists have been carrying out experiments on homing pigeons
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  • Rebecca949

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1)But did you know that this common bird is able to find is way home from even hundreds of kilometers away
2)a landmark silly ,for example is it open-house
3)For quite a few years now, scientists have been carrying out experiments on homing pigeons
1

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  • Rebecca949

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