1. 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.
A. extinction; its numbers are now five times greater than
B. extinction; its numbers are now five times more than
C. extinction; its numbers now fivefold what they are
D. extinction, now with fivefold the number they had
E. extinction, now with five times greater than
2.Florida will gain another quarter-million jobs this year alone, many of them in high-paying fields like electronics and banking, making the state's economy far more diversified than ten years ago.
A. high-paying fields like electronics and banking, making the state's economy far more diversified than
B. high-paying fields like electronics and banking, and making the state's economy far more diversified than its economy
C. high-paying fields such as electronics and banking, to make the state's economy far more diversified than
D. such high-paying fields as electronics and banking, making the state's economy far more diversified than it was
E. high-paying fields like electronics and banking, and make the state's economy far more diversified than it was.
我觉得这两道题都是现在和过去进行比较，但是为什么第一道题选a，第二道题选d,第一道题和过去的比较为什么能省略掉they were， 而第二道就不能省略?谢谢各位
可能是因为例一中than 后面是when引导的状语从句，其中已有was出现说明是1970's时的状态
如果when前再加上they were感觉重复且笨拙。楼主可以去搜一下以前的讨论贴看一看
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