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In late 1997, thechambers inside the pyramid of the Pharaoh Menkaure at Giza were closed tovisitors for cleaning and repair due to moisture exhaled by tourists, whichraised its humidity to such levels so that salt from the stone wascrystallizing and fungus was growing on the walls. A. due to moisture exhaled by tourists, which raised its humidity to suchlevels so that salt from the stone was crystallizing B. due to moisture that tourists had exhaled, thereby raising its humidityto such levels that salt from the stone would crystallize C. because tourists were exhaling moisture, which had raised the humiditywithin them to levels such that salt from the stone would crystallize D. because of moisture thatwas exhaled by tourists raising the humidity within them to levels so high asto make the salt from the stone crystallize (E) E. because moisture exhaledby tourists had raised the humidity within them to such levels that salt fromthe stone was crystallizing
答案选e,想请教下为什么e中的they没有指代问题而d中的they就指代不清了呢? |
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