(During) the early stages of the industrial revolution, perhaps (one in every seven) (deaths) in Europe’ s (crowded cities) was

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问题 (During) the early stages of the industrial revolution, perhaps (one in every seven) (deaths) in Europe’ s (crowded cities) was caused by tuberculosis.

选项 A、During
B、one in every seven
C、deaths
D、crowded cities

答案A

解析 改为at。at the stage of在…阶段。
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