-I called you yesterday evening,but nobody answered the phoone.-Oh,I___a walk with my mother at that time.A.take B.took C.am taking D.was taking

问题描述:

-I called you yesterday evening,but nobody answered the phoone.
-Oh,I___a walk with my mother at that time.
A.take B.took C.am taking D.was taking

选 D 过去进行时,说明在昨天打电话的时候正在发生的事情

答案:D
at that time 在那个时候,强调这里用过去进行时.