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 Answer: A 小妹我想要問一下這題要怎麼解? 因為我真的解不出為什麼是A.... 希望有那位賢人能夠幫忙一下....謝謝! -- "There's only three choices in this life : be good, get good or give up. - Gregory House." --

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