问题
单项选择题
I walked slowly through the market, where people () all kinds of fruits and vegetables: I studied the prices carefully and bought what I needed.
A. sell
B. were selling
C. had sold
D. have sold
答案
参考答案：B
解析：
本题考查动词的时态，说话人谈论的是过去的事情，排除A和D。由句意可知说话人描述的是他/她缓慢穿过市场的时候看到的景象，因此应该用过去进行时。故 选B。