A) doing/What/at/you/ were/8 o'clock/ ?
-What were you doing at 8 o`clock?
-I was washing up when my friends arrived.
c)came in/a/were/We/test/when/the/head teacher/writing
-We were writing a test when the head teacher came in.
-Your brother was playing the computer games all time.
Mam nadzieje ze pomoglam pozdrawiam ;);*