单选题 12.The vocabulary and grammatical differences between British and American English are so trivial and few as hardly______.
【正确答案】 D
【答案解析】“so+形容词”后面可跟表示结果的that从句或as+不定式;so trivial and few ashardly to be noticed“太小太少,几乎引不起人们的注意”。