Ask for more information
example: i was writing a letter (where?)- where were you writing a letter?
1) He was buying a present for Helen (when?)
2) we were playing ping-pong (where?)
3) they were skating (where?)
4) it was raining (when?)
5) we were staying at a hotel (why?)
6) we were doing the city (with whom?)
7) she was speaking to mr green (why?)
8) she was visiting my grandparents (when?)
9) you were swimming (where?)