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____ directly to the sun in summer will do great harm to our skin.

  A. Be exposed               B. Being exposed              C. Exposing                D. Exposed

 

【答案】

B

【解析】非谓语动词辨析。动名词短语做主语且需用被动结构。意为:夏天被直接暴露在太阳下会对我们皮肤有害。

 

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