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If you spend enough money advertising, your product sales will surely_________.

A. expand   B. enlarge   C. extend   D. increase

D   


解析:

increase 增加。句子意思:如果你花足够的钱作广告,那么产品的销量就会增加。

A扩大、膨胀 B放大 C延伸、扩展

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