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英语小题用下列所给词语适当形式填空one,everyone,usual,for,hundred.There is som

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英语小题
用下列所给词语适当形式填空
one,everyone,usual,for,hundred.
There is something people didn't understand in the sky.The USAF __1__used the words "Unidentified Flying Object"to describe them.Today __2__ uses the termUFO.When people see a UFO,it is --3-- a weather balloon or an airplane.But the Center --4--UFO Studies continuses tu receive --5--of reports every year.
fly,look,understand,study,be
In 1947 a businessman and pilot,Kenneth Arnold,--6-- near Mount Rainier,Washington when he saw nine shiny,round objects flying through the air.He told a newspaper reporter that they --7-- like "pie plates skipping over water".The reporter used the words "flying saucer"in his story and today that --8-- a popular name for UFOs.
Now in different countries,many people --9-- the UFOs.Some people make mistakes when they say they have seen UFOs.But people still can't--10--UFOs clearly.It may take many years to find a clear answer.
额.如果是夸奖的话.
everyone one usually for hundreds
was flying looked is study understand