At the turn of the twentieth century, forest covering as much as 90 percent of Thailand and accommodating as many as 300,000 elephants, a third of them domesticated and performing various essential tasks.


covering as much as 90 percent of Thailand and accommodating as many as 300,000 elephants, a third of them

covering as much as 90 percent of Thailand accommodated as much as 300,000 elephants, and a third of them were

covered as much as 90 percent of Thailand and accommodated as much as 300,000 elephants, with a third

covered as much as 90 percent of Thailand and accommodated as many as 300,000 elephants, a third of them

covered as much as 90 percent of Thailand and accommodating as many as 300,000 elephants, with a third of them

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题目分析：

略。


选项分析：

选项A：本选项没有谓语动词，covering和accommodating都是现在分词。

选项B：首先，由于“大象（elephants）”是个可数名词，所以需要将as much as改成as many as。另外，连词and连接的两个句子主干分别为：
At the turn of the twentieth century, forest accommodated as much as 300,000 elephants
a third of them were domesticated and performing various essential tasks
在逻辑上，两句话并不具有并列关系。a third of them were domesticated and performing various essential tasks在语意上是补充说明300,000 elephants的。

选项C：accommodated as much as 300,000 elephants中as much as需要改成as many as，这个错误选项(B)。

选项D：Correct. 本选项在语法和逻辑上均是正确的。

选项E：连词and需要连接两个并列的句子（参考功能平行）。因此，accommodating应改为动词过去式accommodated。

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