扫描二维码，直接登录
题库 / Prep2007E1-SC-124
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.
an increase in their use can create serious environmental problems such as water pollution, and their substitution for more traditional fertilizers
an increase in their use can create serious environmental problems like water pollution, and if substituted for more traditional fertilizers, it
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
the increased usage of these fertilizers can create serious environmental problems such as water pollution, while if substituted for more traditional fertilizers, this substitution
the increased usage of these fertilizers can create serious environmental problems like water pollution, while their substitution for more traditional fertilizers
B. if substituted for more traditional fertilizers, it may accelerate soil structure deterioration and soil erosion. It应该指代的是substitution这个过程，那么代入从句就变成了if substitution is substituted for more traditional fertilizers.明显不对
C. if used as substitutions for…, 这意味了肥料它们本身是substitutions，that doesn’t make sense; substitution通常是用一个事物取代另一个事物的过程，并不是一个事物本身。E.g. Correct: I exchanged my rental car for a truck. Incorrect: This truck was an exchange for my rental car.
D. while if substituted for more traditional fertilizers, 主语变成了this substitution，明显不对. While的使用也不对，因为没有对比，应该是并列用and连接
E. while使用问题同D。
登录 或 注册 后可以参加讨论