The problem is difficult for me work out.A. very; toB. enough; toC. so; thatD. too; to

问题补充：

The problem is difficult for me work out.

A. very; to

B. enough; to

C. so; that

D. too; to

答案：

A. very; to

B. enough; to

C. so; that

(答案→)D. too; to

解析：本题意思是这道题对我来说太难,以至于不能做出来.too...to... 意为 太......以至于不能.....,所以选D.