When I got on the bus I I had left my wallet at home.(·山东)A. was realizingB. realize

问题补充：

When I got on the bus，I I had left my wallet at home.(·山东)

A. was realizing

B. realized

C. have realized

D. would realize

答案：

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。