— I called you yesterday but no one answered.
— Well, Maybe I in the garden at that time.
A. worked
B. am working
C. was working
D. would work
网友回答
A. worked
B. am working
(答案→)C. was working
D. would work
解析：考察时态。句意：我昨天给你打电话了，但是没人接。——哦，可能那个时候我正在花园里面忙。结合语境可知下文，描述的是过去某时正在进行的动作，故用过去进行时态。at that time是过去进行时的标志。选C。