— Amy, I called you yesterday evening, but nobody answered the phone.
— Oh, I a walk with my mother at that time.
A. take
B. took
C. am taking
D. was taking
网友回答
A. take
B. took
C. am taking
(答案→)D. was taking
解析：时态考查题。这是两个人之间的对话，第一个人说：“Amy，我昨天晚上给你打电话，但是没有人接电话。”第二个人说：“我在那个时候正在和我的妈妈散步”。根据上下文语境，在过去的某一时间，正在做某事，要用过去进行时，故选D。