—Were you at home 7:00 last night?—Yes I a shower at that time.A. tookB. was takingC. wa

问题补充：

—Were you at home 7:00 last night?

—Yes, I a shower at that time.

A. took

B. was taking

C. was taken

D. am taking

答案：

A. took

(答案→)B. was taking

C. was taken

D. am taking

解析：此题重点考查过去进行时的基本构成。