--- What made your skin look so terrible?
--- _______ to the sunlight for a long timeA.Because it was exposedB.After being exposedC.Being exposedD.Exposed
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C解析句意：什么使你的皮肤看起来如此糟糕呢？可知是对主语进行提问。答语为：长时间暴露于阳光下使我的皮肤看起来如此糟糕。Be exposed to 暴露于，所以用动名词做主语，省略了重复的部分。选C。