Where were you at 7:00 last night? -- I to my mom at home.A. writeB. was writingC. wrot

问题补充：

--Where were you at 7:00 last night?

-- I to my mom at home.

A. write

B. was writing

C. wrote

D. am writing

答案：

A. write

(答案→)B. was writing

C. wrote

D. am writing

解析：在过去的点时间发生的事情，用过去进行时，表示，故选B