— 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
网友回答
A. am playing
(答案→)B. was playing
C. played
D. have played
解析：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。