62、 Unlike frogs that metamorphose from tadpoles into adults within a one-year period, it takes three to four years for the mountain yellow-legged frog of the Sierra Nevada to reach adulthood, and so they are restricted to deeper bodies of water that do not dry up in summer or freeze solid in winter
　　(A) it takes three to four years for the mountain yellow-legged frog of the Sierra Nevada to reach adulthood, and so they are
　　(B) it takes the mountain yellow-legged frog of the Sierra Nevada three to four years until it reaches adulthood, and therefore it is
　　(C) in the Sierra Nevada, mountain yellow-legged tree frogs take three to four years to reach adulthood, thus being
　　(D) mountain yellow-legged frogs of the Sierra Nevada take three to four years until they reach adulthood, thus
　　(E) mountain yellow-legged frogs of the Sierra Nevada take three to four years to reach adulthood, and so they are
　　原文意思：
　　不想一种青蛙，另外一种青蛙得花三到四年才能成熟，并且这种青蛙只能在深水里面呆着
　　题目分析：
　　根据 unlike frog 我们就知道后面应该以 frog 开头，ABC 先干掉。DE 进行比较，这两个选项最大的区别就是 they 这个代词出现的位置，一个先说，一个在逗号后面说，逗号前面是一个完整的意思，reach 和 take 两个动词的发起者都是 frogs，没有必要加 they，否则就是英吉不仅杀人而且他放火了。而后面 restriced 是一个独立的意思，如果不加 they，动词发起者就不明确了，所以 they 应该放在逗号后面，选 E。

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