问题补充:
— Why didn’t you come to play football with us yesterday afternoon?
— I my mother with the housework then.
A. was helping
B. helped
C. had helped
D. have been helping
答案:
(答案→)A. was helping
B. helped
C. had helped
D. have been helping
解析:句意:昨天下午你为什么不来和我们一起踢足球呢?那时我在帮我妈妈做家务。根据then及情景可知该用过去进行时,所以选A。