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  3. Each of the built-in costs of a product must bring in some profit at each stage: truckers must profit from transporting products

Each of the built-in costs of a product must bring in some profit at each stage: truckers must profit from transporting products

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问题 Each of the built-in costs of a product must bring in some profit at each stage: truckers must profit from transporting products, or they______ in business.
选项 A、would not be
B、will not be
C、were not
D、can not be
答案A
解析 or在此处的意思相当于or else或otherwise，所以后面句子的谓语应用动词的虚拟形式。
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