2. 外语
  3. To survive in the intense trade competition between countries, we must______ the qualities and varieties of products we make to

To survive in the intense trade competition between countries, we must______ the qualities and varieties of products we make to

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问题 To survive in the intense trade competition between countries, we must______ the qualities and varieties of products we make to the world-market demand.
选项 A、improve
B、enhance
C、guarantee
D、gear
答案D
解析 ..to...根据……调整……，improve，enhance两个单词与varieties 搭配都不恰当，guarantee 也不能与 varieties搭配，
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