Unlike other Mayan cities, Cancun's commercial power throughout the lowlands seems to be from using its strategic position at the foot of the highlands, which were a source of jade, obsidian, and other valuable commodities.
A. Cancun's commercial power throughout the lowlands seems to be from using its strategic position at the foot of the highlands, which were a source of jade, obsidian, and other valuable commodities B. Cancun's commercial power throughout the lowlands seems to have come from using its strategic position at the foot ofthe highlands, a source of jade, obsidian, and other valuable commodities C. the commercial power of Cancunthroughout the lowlands seemed to have come from using its strategic position at the foot of the highlands, a source of jade, obsidian, and other valuablecommodities D. Cancun seemedto be using its strategic position at the foot of the highlands, which was asource of jade, obsidian, and other valuable commodities, in becoming acommercial power throughout the lowlands E. Cancun seems to have used its strategicposition at the foot of the highlands, a source of jade, obsidian, and other
valuable commodities, to become a commercial power throughout the lowlands RON大神的解释是说,D选项中的which修饰前面的highlands,第一个是meaning不对,第二是highlands是复数,动词的单复数也错了。但是RON有一期课讲“which”的用法时好像说过,which是可以修饰the NOUN + PRE PHRASE that immediately precedes the comma。那D选项中为什么不能理解成which是修饰strategic position(noun)+ at the foot of the highland (pre phrase)呢?
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