To survive in the intense market competition, we must ________ the qualities and

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问题 To survive in the intense market competition, we must ________ the qualities and varieties of products we make to the world-market demand.

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

答案 C

解析 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”；improve则作“提高，改善”讲。因此C为正确选项。

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