—Were you at home at 9:00 pm yesterday?— Yes I for a call at that time.A. was waitingB.

问题补充：

—Were you at home at 9:00 pm yesterday?

— Yes, I for a call at that time.

A. was waiting

B. am waiting

C. will wait

D. waited

答案：

(答案→)A. was waiting

B. am waiting

C. will wait

D. waited

解析：此题考查动词的过去进行时的基本构成，故选A