问题
选择题
— 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
题目分析：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。