Although improved efficiency in converting harvested trees into wood products may reduce harvest rates, it will stimulate demand by increasing supply and lowering prices, thereby boosting consumption.


in converting harvested trees into wood products may reduce harvest rates, it will stimulate demand by increasing supply and lowering prices, thereby boosting

in converting harvested trees into wood products may reduce harvest rates, demand will be stimulated because of increasing supply and lowering prices, which boost

of converting harvested trees into wood products may reduce harvest rates, it will stimulate demand by increasing supply and lowering prices, which boosts

of harvested trees being converted into wood products may reduce harvest rates, it will stimulate demand, because it will increase supply and lower prices, thereby boosting

when harvested trees are converted into wood products may reduce harvest rates, demand will be stimulated because of increasing supply and lowering prices, which boost

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题目分析：

本题的主干为：
Although improved efficiency may reduce harvest rates, it will stimulate demand. 


选项分析：

A选项：Correct. 本选项在语法和逻辑上均是正确的。

B选项：主句demand will be stimulated because of increasing supply and lowering prices是被动语态，没有指明谁是在逻辑上发出stimulate这一动作的人。我们可以将其近似写为：
X will stimulate demand by increasing supply and lowering prices
在逻辑上，although所引导的句子的内容是：“上升的效率会减少收获比率（坏事）”，如果想和该句形成转折，必须说明一个“上升的效率带来的好事”，而不是“某个原因带来的好事”， 因此，只有当improved efficiency能带来好事时，stimulate句才能和reduce句形成转折关系。

C选项：which boosts consumption是非限定性定语从句，修饰单数名词。真正发出“上升消费”的是improved efficiency，虽然是单数，但是距离这个定语从句太远，无法满足就近修饰原则。

D选项：improved efficiency的定语 of harvested trees being converted into wood products的核心词为harvested trees。上升了效率的应该是“转换（convert）”这个行为，而不是“树”。

E选项：主句demand will be stimulated because of increasing supply and lowering prices被动语态错误同(B)。

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