Yesterday evening I along the street when I suddenly met my maths teacher.A. walkB. walk

问题补充：

Yesterday evening, I along the street when I suddenly met my maths teacher.

A. walk

B. walked

C. was walking

D. am walking

答案：

A. walk

(答案→)B. walked

C. was walking

D. am walking

解析：考查句子的时态。理解句意，当我突然遇到我的数学老师的时候，我已沿着街道散步，散步这个动词用过去进行时，故选B项。