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题库 / Prep2007E2-SC-146
The gyrfalcon, an Arctic bird of prey, has survived a close brush with extinction; its numbers are now five times greater than when the use of DDT was sharply restricted in the early 1970's.
extinction; its numbers are now five times greater than
extinction; its numbers are now five times more than
extinction, their numbers now fivefold what they were
extinction, now with fivefold the numbers they had
extinction, now with numbers five times greater than
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不是很理解这道题是怎样保证平行结构的？求老师和同学解答。
Thanks in advance.
Its numbers are now five times greater than (its numbers were) when the use of DDT was sharply restricted in the early 1970's. 省略了主语和谓语因为一致
now和when时间状语从句平行
1.numbers 和 number 都可以表示数量
2.原件用分号，两个句子，时态不同，前句现在完成时:讲的是鸟从extinction中survive了，后句一般现在时now：补充说明 不仅活下来了，还变成了5倍
D,E 改成with伴随状语，没有写成分号两个句子好。
3.now with错：第一，修饰主语gyrfalcon，表示伴随survive的动作，不合逻辑
第二，前句有with extinction，这里再用with，容易让人产生两者平行的歧义
重点：
1.numbers用greater不用more
2.主语单数用 its 不是they their
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