问题
选择题
— I went to your house yesterday afternoon, but you were not in.
— Sorry. I _______ basketball with my classmates.
A．am playing
B．was playing
C．played
D．have played
答案
答案：B
题目分析：此题考查过去进行时的基本用法和构成，表示昨天下午你去找我的那个时刻我正在打篮球，故选B。
点评：过去进行时表示过去某个时刻正在进行的动作或存在的某种状态。