Happy times usually pass quickly without .
A. noticing
B. being noticed
C. having noticed
D. to be noticed
网友回答
A. noticing
(答案→)B. being noticed
C. having noticed
D. to be noticed
解析：考查时态，由介词without可以知道后面的词用动名词形式，名词times和动词notice是动宾关系，所以用被动语态，句子意思“幸福的时光没被注意很快就过去了”，所以选B