考非谓语动词的难词

问题描述:

考非谓语动词的难词
The vocabulary and grammatical differences between British and American English are so trivial and few as hardly__.
1 noticed 2 to be noticed 3 being noticed 4 to notice

这题的主语是differences 与notice 是动宾关系,所以要用不定式的被动语态,选择2