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OG 解释说c, d 的them 指代模糊,让人觉得是在指代tourists, e指代清除, e的them指代了主语 chambers 看了半天,觉得没什么区别, 为什么e的them指代是对的呢?
OG 12 6. In late 1997, the chambers inside the pyramid of the Pharaoh Menkaure at Giza were closed to visitors for cleaning and repair due to moisture exhaled by tourists, which raised its humidity to such levels so that salt from the stone was crystallizing and fungus was growing on the walls. (C) because tourists were exhaling moisture, which had raised the humidity within them to levels such that salt from the stone would crystallize (D) because of moisture that was exhaled by tourists raising the humidity within them to levels so high as to make the salt from the stone crystallize (E) because moisture exhale by tourists had raised the humidity within them to such levels that salt from the stone was crystallizing |
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