The vocabulary and grammatical differences between British and American English are so few and unimportant as hardly .
A. noticed
B. to notice
C. being noticed
D. to be noticed
网友回答
A. noticed
B. to notice
C. being noticed
(答案→)D. to be noticed
解析：
本题考查非谓语动词。介词短语between British and American English修饰differences，so as to do引导的不定式作结果状语。句意：英式英语和美式英语之间的词汇和语法区别甚微，人们几乎注意不到。