问题补充：
This new English-English dictionary is useful for me. , I’ll buy it.
A. How much may it cost
B. No matter how it may cost
C. However much it may cost
D. How may it cost
答案：
A. How much may it cost
B. No matter how it may cost
(答案→)C. However much it may cost
D. How may it cost
解析：考查让步状语从句：句意：这个决心的英英字典会对我很有用。无论花多少钱，我都会买下来。However和No matter how都可以引导让步状语从句，结构是：However/No matter how+形容词/副词+主谓，所以选C。
