1. was not sleeping ..................... I was thinking
2/ I wasn't wearing ................. I was trying
3/ wasn't listening
4/ wasn't playing because it was raining
5/ We weren't swimming because the weather was cold
6/ I was doing shopping at the time
7/ I didn't, I was joking
8/ We weren't running because a thunderstorm began
9/ I was whispering the answer to John
10/ I didn't tell her because she was busy, she was talking on the phone