第24题: [单项选择]To survive in the intense market competition, we must ______ the qualities and varieties of products we make to the world-market demand. A. improve B. guarantee C. gear D. enhance 参考答案:C 答案解析:[试题分析] 此题考查动词的词义及搭配。 [详细解答] gear to意为“使……适合,配合”;符合本题题意;enhance意为“增加,提高”;guarantee意为“保证,担保”;impr