—What were you doing when I called you at 8 p.m. yesterday???

—I ??? the piano at that time.

A. play??????????? B. is playing????????? C. played??????? D. was playing

 ----What were you doing _________ 8 last night?

----- While I was wandering in the street, I noticed a wallet __________ on the ground.

A. at; laying       B. on; lie        C. on; laid       D. at; lying

— May I come in? I'm sorry I am late.

  — Come in, please. But could you please tell me         ?

   A. how do you come to school      B. what were you doing then

  C. who you talked with             D. why you are late again

—What were you doing when the UFO arrived?— I         with my dog on the street.

A. walked           B. was walking      C. is walking       D. have walked

---What were you doing at this time last night?

  --- I _________ a phone call.

    A. made                      B. will make                        C. has made              D. was making