When I got on the bus，I I had left my wallet at home.(2011·山东)
A. was realizing
B. realized
C. have realized
D. would realize
网友回答
A. was realizing
(答案→)B. realized
C. have realized
D. would realize
解析：考查动词的时态。我上车后意识到把钱包忘在家里了。结合语境可知，这里描述的是过去发生的一个瞬间动作，所以用一般过去时。