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.(2010年厦门大学考博试题)

选项 A、improve
B、enhance
C、guarantee
D、gear

答案D

解析 在给出的选项中:improve“改善,增进”;enhance“增加,提高”;guarantee“保证,担保”;gear(常与to连用)“使适应,使适合”。根据句意和各个选项的意思可知,正确答案是D。
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