问题
选择题
While Helen _____ along the river after supper, she ____ a wallet lying on the roadside.
A. was walking; was finding B. walked; found
B. walked; was finding D. was walking; found
答案
答案:D
题目分析:While引导的从句表示两个动作同时进行或紧接着发生,find为短暂性动作,通常不用进行时,句意为:晚饭后海伦沿着河边散步的时候,发现路边有个钱包。故选D。