单选题 The vocabulary and grammatical differences between British and American English are so trivial and few as hardly ______.
A. noticed B. being noticed C. to notice D. to be noticed

【正确答案】 D

【答案解析】[解析] “so+形容词”后面可跟表示结果的that从句或as to不定式；so trivial and few as hardly to be noticed太小太少，几乎引不起人们的注意。