Companies buy information from marketing analysts to help characterize their customers and learn______.

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问题 Companies buy information from marketing analysts to help characterize their customers and learn______.

选项 A、finding more of them
B、that finding more of them
C、they find more of them
D、how to find more of them

答案D

解析 Learn must have a noun structure as its direct object; how to find more of them is an infinitive phrase.
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