prep1-124不解~~

TOM99

Whereas the use of synthetic fertilizers has greatly expanded agricultural productivity in many parts of the world, an increase in their use can create serious environmental problems such as water pollution, and their substitution for more traditional fertilizers
                may accelerate soil structure deterioration and soil erosion.

(A) an increase in their use can create serious environmental problems such as water pollution, and their substitution for more traditional fertilizers

(B) an increase in their use can create serious environmental problems like water pollution, and if substituted for more traditional fertilizers, it

(C) if these fertilizers are used increasingly, they can create serious environmental problems such as water pollution, and if used as substitutions for more traditional fertilizers, they

(D) the increased usage of these fertilizers can create serious environmental problems such as water pollution, while if substituted for more traditional fertilizers, this substitution

(E) the increased usage of these fertilizers can create serious environmental problems like water pollution, while their substitution for more traditional fertilizers

答案是A, 我觉得是D, 它给D的错误理由是

 if substituted…, this substitution…的表达方式啰嗦不简洁；while表达了转折的含义，而原句中由

and连接并列的句子，并没有此含义。

可是我认为相比较这个啰嗦的问题，A的an increase(中心词)怎么能create environmental problems ,应该是usage create problem, 另外while 也不一定表转折的意思~~

 if substituted…, this substitution…的表达方式啰嗦不简洁；while表达了转折的含义，而原句中由

and连接并列的句子，并没有此含义。

可是我认为相比较这个啰嗦的问题，A的an increase(中心词)怎么能create environmental problems ,应该是usage create problem, 另外while 也不一定表转折的意思~~

fighting127

D错了因为前面用了Whereas 又来一次转折是不对的

另外除了 if substituted…, this substitution…的表达方式啰嗦不简洁 substituted for 什么在substituted?

如果说这里while 也不一定表转折表同时 那就成了2个句子了 还是不通顺

相比之下选A更好

TOM99

了解了~~

stleung

我觉得这题应该是要选A，我个人觉得A中的and有种表示递进关系的意思，如果用while就表示转折了，不符合逻辑！

情未浓

D选项主要是错在：
"while if substituted for more traditional fertilizers, this substitution"部分，if从句后面没有主语，这里substituted修饰this substitution.逻辑意思错误。

另外我也认为while用在这里和whereas重复，一个句子中whereas + clause,while + clause. "whereas"&"while"都是连词，显然也是错误的。

dreamistrue

不用怀疑官方答案的正确性，我们要做的是研究为什么答案是对的，而不是钻牛角尖想答案可能会是错的。GMAC才是制定游戏规则的人。D选项"while if substituted for more traditional fertilizers, this substitution"部分错误。如果前面是一个modifier（没有主语的），那么逗号后面紧接着的句子的名词就是前面的逻辑主语。  这里if没有主语，所以用后面的substituition做主语，2个substitution，错误。