问题
选择题
—What were you doing at this time yesterday?
—I ______ on the grass and playing with Tony.
A．sit
B．sat
C．am sitting
D．was sitting
答案
答案：D
题目分析：句意：昨天的这个时间你在做什么?我在草地上坐着和Tony一起玩.过去进行时表示过去某某一时刻或过去一段时间内正在进行的动作.常用的时间状语then,at that time,this time yesterday,at ten yerterday等, 根据语境和题意故选D.