More than 300 rivers drain into Siberia's Lake Baikal, which holds 20 percent of the world's fresh water, more than all the North American Great Lakes combined.


More than 300 rivers drain into Siberia's Lake Baikal, which holds 20 percent of the world's fresh water, more than all the North American Great Lakes combined.

With 20 percent of the world's fresh water, that is more than all the North American Great Lakes combined, Siberia's Lake Baikal has more than 300 rivers that drain into it.

Siberia's Lake Baikal, with more than 300 rivers draining into it, it holds more of the world's fresh water than all that of the North American Great Lakes combined, 20 percent.

While more than 300 rivers drain into it, Siberia's Lake Baikal holds 20 percent of the world's fresh water, which is more than all the North American Great Lakes combined.

More than all the North American Great Lakes combined, Siberia's Lake Baikal, with more than 300 rivers draining into it, holds 20 percent of the world's fresh water.

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题目分析：
本题难度较大，需要仔细区分成分及语意方可找到答案。

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：that is more than all the North American Great Lakes combined是定语从句，但非限定性定语从句不能用that来引导，只能用which。另外，在主句部分，我们不能说Siberia's Lake Baikal has more than 300 rivers，即，Baikal不能拥有300条河，只能是三百条河流入Baikal。

C选项：语法有误。Siberia's Lake Baikal和代词it均是holds的主语，这造成了一个句子有两个主语。另外，with more than 300 rivers draining into it是独立主格结构，其是holds句的状语。在逻辑上，三百条河流入Baikal应是在描述Siberia's Lake Baikal的性质的，而描述名词的均应该是定语，不能使用状语。

D选项：状语从句while more than 300 rivers drain into it有误。它在修饰主句hold这个动作。但在逻辑上，“300条河流入”和“湖里的水占据了多少百分比的全球淡水”之间没有时间关系。也就是说，不能说“当300条河流入的时候，湖里的水就占了20%”。这好像是给“占20%”加了一个限定的时间。
又或者，现在如果突然所有的河都不流入了，短时间内这个湖逻辑上还是会占20%的淡水的。因此，不能用“流入”这个动作来做“占据”的时间状语。

E选项：with more than 300 rivers draining into it是独立主格结构错误同选项(C)。

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题目分析：
本题难度较大，需要仔细区分成分及语意方可找到答案。

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：that is more than all the North American Great Lakes combined是定语从句，但非限定性定语从句不能用that来引导，只能用which。另外，在主句部分，我们不能说Siberia's Lake Baikal has more than 300 rivers，即，Baikal不能拥有300条河，只能是三百条河流入Baikal。

C选项：语法有误。Siberia's Lake Baikal和代词it均是holds的主语，这造成了一个句子有两个主语。另外，with more than 300 rivers draining into it是独立主格结构，其是holds句的状语。在逻辑上，三百条河流入Baikal应是在描述Siberia's Lake Baikal的性质的，而描述名词的均应该是定语，不能使用状语。

D选项：定语从句which is more than all the North American Great Lakes combined应就近修饰，这里只能修饰20 percent of the world's fresh water，这是不正确的。该定语从句描述的在逻辑上应是Siberia's Lake Baikal的特点。

E选项：with more than 300 rivers draining into it是独立主格结构错误同选项(C)。

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