[讨论]刘振民E11-63

刘振民E11-63
                    

The debate over bilingual education centers on the issue of whether the United States should foster the idea of single common language, an idea, some believe, that has in the past been crucial in binding diverse constituencies together.

(A) been crucial in binding diverse constituencies together

(B) been crucial as a binding together of diverse constituencies

(C) been crucial to bind together constituencies that are diverse

(D) become crucial in binding together diverse constituencies（A）

(E) become crucial to bind together constituencies that are diverse

答案:a , 我知道
                diverse constituencies together 比
                constituencies that are diverse。

但是我有个疑问是
                crucial to 不是惯用语吗? 那crucial in 算是正确吗?
                

两个短语都是正确的。

我用google查了一下,的确crucial in也是惯用。谢谢足球幽灵