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 One of the many ________leading to widespread unemployment is the growth of mechanization.

  A.reasons       B.causes        C. factors       D.goals

C 句意:导致大范围失业的各种因素之一是机械化的增加。四个选项中,A和B的含义相近,reason表示产生某种行为或想法的推理上的理由,着重指解释或说明某事发生的理由或原因;cause指导致某一事件发生的起因,着重指产生或造成某事发生的原因,往往指造成不好的影响。或者说,cause多指引起某事发生的客观因素,而reason用来解释某事为什么会发生,如the reason for your absence,the cause of your disease。

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