一道SAT语法题（3）,The cost of (safely disposing) of the toxic chemicals (is approximately) (five times what) the company paid (to purchase it).(No error)答案是选D.依然是想知道怎么改.我理解的是,首先it很多余,其实paid和
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一道SAT语法题（3）,The cost of (safely disposing) of the toxic chemicals (is approximately) (five times what) the company paid (to purchase it).(No error)答案是选D.依然是想知道怎么改.我理解的是,首先it很多余,其实paid和
一道SAT语法题（3）,
The cost of (safely disposing) of the toxic chemicals (is approximately) (five times what) the company paid (to purchase it).(No error)
答案是选D.
依然是想知道怎么改.
我理解的是,首先it很多余,其实paid和to purchase好像是有语义上的重复.应该怎么改?
一道SAT语法题（3）,The cost of (safely disposing) of the toxic chemicals (is approximately) (five times what) the company paid (to purchase it).(No error)答案是选D.依然是想知道怎么改.我理解的是,首先it很多余,其实paid和
应该改为for purchasing it.
paid 和 purchase 语义上不重复,paid不一定就是用来买这些chemical的,也可以是其他的费用,比如运输、保险、税务等费用.另外it也不多余,不然purchasing就没着落了,必须要有个代词指代the toxic chemicals,否则可以是买任何东西啊.
要改的是 paid to do sth这个结构,这个结构的意思是“被雇佣（付了钱）去做某事”,而句子本身要表达的意思是什么什么的开支,应该是 pain for sth 的结构.
paid to purchase it 改为paid for them（them指代chemicals）