prep1#33 水量的比较与北美五大湖的比较

33.  
            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.

(A)
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.

(B) 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.that裸奔了！

(C) 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.（it多余了！）

(D) 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.

应该是water more than all the North American Great Lakes combined, 而不是Siberia's Lake
                Baikal吧