题目内容
Fill in the blanks with the given words in their proper forms(用所给单词的适当形式填空,每空格限填一词):
Much ______ has been made in the safety devices of the factory.(improve)
答案:improvement
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题目内容
Fill in the blanks with the given words in their proper forms(用所给单词的适当形式填空,每空格限填一词):
Much ______ has been made in the safety devices of the factory.(improve)