—Where have you _________ all day?
—I came back at noon and I _________ in this room ever since.

—Where have you _________ all day?

—I came back at noon and I _________ in this room ever since.

—Where have you___________, Mike?

     I have　____________ to the library with my friends.

   A. been; gone                B. gone; been

   C. been; been                D. gone; gone

—Where have you _____ all day? —I came back at noon and I ____ in this room ever since.

—Where have you _____? —I have _____the teachers’ office.