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itokinblue

T-4-Q16

Humans have been damaging the environment for centuries by overcutting trees and farming too intensively, and though some protective measures, like the establishment of national forests and wildlife sanctuaries, having been taken decades ago, great increases in population and in the intensity of industrialization are causing a worldwide ecological crisis.  CB

1. though some protective measures, like the establishment of national forests and wildlife sanctuaries, having been taken decades ago, great increases in population

2. though some protective measures, such as the establishment of national forests and wildlife sanctuaries, were taken decades ago, great increases in population

3. though some protective measures, such as establishing national forests and wildlife sanctuaries having been taken decades ago, great population increases

4. with some protective measures, like establishing national forests and wildlife sanctuaries that were taken decades ago, great increases in population

5. with some protective measures, such as the establishment of national forests and wildlife sanctuaries, having been taken decades ago, great population increases

当时选的时候无从下手，Ｂ后面的great increases in population怎么理解啊？

carmelin

"in population" and "in the intensity of industries" modifies "increase"

itokinblue

......晕．．．句子又没看全．．．

苹果古

FYI:根据后面未划线部分的and in the intensity可知and前面是in population保持平行。排除BE

根据decades ago，说明得用一般过去时

举例时用such as,for example不用like

个人总结：with 只有在做结果状语或独立主格的时候才是正确答案，一般情况下都是迷惑选项。而且根据题意，这里必须用though表示让步或转折。

judyenglish

此题答案是：B

解题思路：

1.      举例用such as

2.      名词>ing

3.      having been done必错

4.   and前后对称：in population and in the intensity