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221. Consumers may not think of household cleaning products to be hazardous substances, but many of them can be harmful to health, especially if they are used improperly. (A) Consumers may not think of household cleaning products to be (B) Consumers may not think of household cleaning products being (C) A consumer may not think of their household cleaning products being (D) A consumer may not think of household cleaning products as (E) Household cleaning products may not be thought of, by consumers, as
我知道选D的原因,只是有个问题,有点不明白 A consumer 后面 为什么不用thinks? A consumer 应该是第三人称的单数,后面为什么think?
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