—I phoned you at 5:00 yesterday afternoon but nobody answered me.—Sorry. I the flowers in

问题补充：

—I phoned you at 5:00 yesterday afternoon, but nobody answered me.

—Sorry. I the flowers in the garden at that time.

A. was watering

B. am watering

C. water

D. will water

答案：

(答案→)A. was watering

B. am watering

C. water

D. will water

解析：根据答句中的at that time 可知描述的是过去某时正在进行的动作，故用过去进行时。故选A。