GMAT每日一题-语法第二十三题

The lroquois were primarily planters, but supplementing their cultivation of maize, squash, and beans with fishing and hunting.

(A)    but supplementing

(B)    and had supplemented

(C)    and even though they supplemented

(D)    although they supplemented

(E)     but with supplementing

题目分析：but的出现表示划线内外存在一个转折的对应关系，Abut后面用supplementing但是前面没有与其对应的表达方式，干掉。B用had supplemented，前面用were planters，无法对应，C用and和even though，and表示并列，但是even though表示转折，两者无法一起用，干掉，D although后面是个句子，前面是个句子，形成对应，留着。E but后面用with引导的介词短语，前面没有对应的表达方式，干掉。