我是这么理解的: C 出现了新的主语tourists,于是导致them指代不清。选择E的结构不造成这个问题。 D 不太懂怎么解释……because of的出现要小心……
6.In late 1997,the chambers inside the pyramid of the Pharaoh Menkaure at Gizawere closed to visitors for cleaning and repair due to moisture exhaled by tourists, which raised its humidity to such level 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 salt from the stone was crystallizing E because moisture exhaled by tourists had raised the humidity within them to such levels that salt from the stone was crystallizing. OG上说 C和D 选项中的them "seem to refer tourists",我想问正确选项中E中的them 难道就不指向tourist嘛?为什么? -- by 会员 坨坨元 (2011/7/15 0:11:48)
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