In a competitive economy, the consumer usually has the choice of several dif

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问题     In a competitive economy, the consumer usually has the choice of several different brands of the same product. Yet underneath their labels, the products are often nearly【B1】______. One manufacturer’s toothpaste tends to differ very little from another manufacture’s. Thus, manufacturers are【B2】______ with a problem—how to keep sales high enough to stay in business. Manufacturers solve this problem by【B3】______. They try to【B4】______ consumers in various ways. In fact, advertisements may be【B5】______into two types according to the kind of appeals they use.
    One type of advertisement tries to appeal to the consumer’s reasoning mind. It may offer a【B6】______ that seems scientific. For example it may say that the dentists【B7】______flash toothpaste. In selling a product, the truth of the advertising may be less important than the appearance of truth. A scientific【B8】______ gives the appearance of truth.
    Another type of advertisement tries to amuse the potential buyer.【B9】______
    One way of doing this is to make the products appear alive. For example,【B10】______. Ads of this sort are silly, but they also tend to be amusing.【B11】______. [br] 【B5】

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答案 classified

解析 空前的can be和空后的into two types提示所填词是表示分类的动诃过去分词。classified意为“分类”。
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