一道SAT改错题Socialscientistsagreethatasystemforexchanginggoodsandservicesisnotonlypresentbutalsoofnecessityinallsocieties.答案说forexchanging错了,可是我认为ofnecessity错误,因为notonlybutalso要用平

Question

一道SAT改错题
Social scientists agree that a system for exchanging goods and services is not only present but also of necessity in all societies.
答案说for exchanging 错了,可是我认为of necessity 错误,因为not only but also 要用平行结构,of necessity 应为NECESSARY.
到底谁对啊?

Answer 1

for exchanging 是最明显的错误,如果你要改of necessity --> necessary,还要该in --> for ...in 有划线么?不管怎样,先把最明显的错误找出来,你想太多了=）