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问题:[单选题]

[单选] The moon was obscured by thick clouds.

A . held
B . prevented
C . darkened
D . blackened

参考答案: B

  参考解析

句意为:厚厚的云朵遮住了月亮。prevent意为“预防、阻止”,hold意为“持有、保留”,darken意为“使模糊、变黑”,blacken意为“使变黑、诽谤”。obscure意为“遮掩,使变暗”。和B项同义,故选B项。

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