1 Dogs have been man`s good friends for t___ of years.Many stories told how brave dogs helped people in t___

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• Dogs have been man`s friends for t＿ of years.Many stories told how brave dogs helped people in t＿.With the help of dogs,
• 1 Dogs have been man`s good friends for t___ of years.Many stories told how brave dogs helped people in t___
• 根据首字母填上所缺单词Dogs have been man's good friend for t( ) of years.Many stories told how brave dogs hel;ed people in t( ).The first spacetraveller was a dog n( ) Laika.It was setup in a manmade earth satellite in 1957 by R( ) scientists.
• Dogs have been man's good friends for t______ of years.Many stories told how brave dogs helpedpeople in t______.With the help of dogs,many people l______ in snow found their way home.Dogs have also helped in many scientific researches(科学研究).The first spacetraveller was a dog n______ Laika.It was sent up in a manmade satellite(人造卫星)in 1957 by R______ scientists.Dogs have become film stars,too.A dog called Lassie was the star in quite a few American f__
• Dogs have been man's good friends for t______ of years.Many stories told how brave dogs helped
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