When I got on the bus II had left my wallet at homeA. was realizingB. realizedC. have rea

问题补充：

When I got on the bus，II had left my wallet at home．

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：考查时态。本句的时间状语是When I got on the bus,这是一个过去时的时间状语，所以B正确。句意：当我上车的时候，我发现我把钱包忘记在家里了。