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. B. due to moisture that tourists had exhaled, thereby raising its humidity to such levels that salt from the stone would crystallize
选B的话就变成了:...were closed to visitors for cleaning and repair due to moisture that tourists had exhaled, thereby raising its humidity to such levels that salt from the stone would crystallize... 错误有:1. raising有修饰cleaning and repair或者往前修饰were closed的嫌疑; 2. its没有指代; 3. would crystallize没有和后面的was growing平行。 不知道这样对不对。
E里的them,只看到them的话的确有指代不清的可能,但是看完后面紧接着的句子... to such levels that salt...就不会有歧义产生。 真是个奇怪的题目。
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