题目内容
Fill in the blanks with words or phrases from unit one to unit three. Change the form where necessary.Encryption should be used when a secret message is ______ online.
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Fill in the blanks with words or phrases from unit one to unit three. Change the form where necessary.During the Cold War years of the last century, China made ______ achievements in developing nuclear weapons.
Fill in the blanks with words or phrases from unit one to unit three. Change the form where necessary.Anyone who wants to complain about unfair treatment must ______ a written report to the committee.
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