GWD 1-23+ GWD1-32:

No.9 GWD 1-23: GWD 2-10: GWD6-39

Past assessments of the Brazilian rain forest have used satellite images to tally deforested areas, where farmers and ranchers have clear-cut and burned all the trees, but such work has not addressed either logging, which is the removal of only selected trees, as well as surface fires, burning down individual trees but do not denude the forest.

1. which is the removal of only selected trees, as well as surface fires, burning

2. which removes only selected trees, or surface fires that burn

3. which removes only selected trees, along with surface fires that burn

4. removing only selected trees, or surface fires, burning

5. removing only selected trees, as well as surface fires that burn  

答案是B,为什么不选D呢

To develop more accurate population forecasts, demographers have to know a great deal more than now about the social and economic determinants of fertility.

1. have to know a great deal more than now about the social and economic

2. have to know a great deal more than they do now about the social and economical

3. would have to know a great deal more than they do now about the social and economical

4. would have to know a great deal more than they do now about the social and economic

5. would have to know a great deal more than now about the social and economical 

我认为选D,因为B中economical 在OG11有提到是与economic不同的意思

但GWD的答案是B

第一题中如果表示解释上文的话，b明显好，d中被逗号隔开的分词有做伴随的歧义

第二题 与你同选，economical是个不可宽恕的错误

怎么我这个版本里的答案是E啊？

因为economical的错误，我也选了D，但还是觉得前面应该是have to know，还请高人指点啊～答案到底选哪个呢？

关于ＧＷＤ１－３２我有一个问题，如果选Ｄ为什么不选Ａ呢？就因为补出ｔｈｅｙ　ｄｏ马？

谢谢！！

第一题：burning只修饰fire这个名词，是定语；不是状语，不修饰前面句子的动作

第二题：首先排除CDE

为了。。。科学家必须。。。。

would have to是虚拟语气，表示早该做了，例如：

I would have told you that before you married.