The problem is difficult for me solve.A. so; toB. quite; toC. too; toD. very; to

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A. so; to
B. quite; to
C. too; to
(答案→)D. very; to
解析：考查词组：So……to……太……以至于……；quite ……to……，对……相当……；Too ……to……，太……而不；very + 形容词 + to do sth 做某事很；句意：这道题对我来说太难而不能解决。故选D。