问题补充:
—Linda, I called you this morning, but nobody answered the phone.
—I’m sorry. I football with my friends then.
A. play
B. played
C. am playing
D. was playing
答案:
A. play
B. played
C. am playing
(答案→)D. was playing
解析:句意:琳达,今天上午我给你打电话,但是没人接。对不起,那时我在和朋友踢足球。根据句意,是指打电话时正在踢足球,所以要用过去进行时,故选D。