1. I … him before we met at the concert.

  
a) didn't see     b) wasn't seeing         c) hadn't seen


2. When mother came home, the children … the soup.

  
a) ate       b) were eating       c) had eaten


3. The telegram … some minutes after he had left.

  
a) came    b) was coming       c) had come


4. While we … the road I saw Victor.

  
a) crossed     b) were crossing      c) had crossed


5. When … your sister … to London?

  
a) did … go    b) was … going   c) had gone