1. I was having lunch when you called me.
2. We were playing tennis at 5 o'clock yesterday.
3. What were you doing at 3 o'clock last Monday?
4. You were singing when your mother came in, weren't you?
5. He was wearing his old jeans when I met him last weekend.
6. Mother was washing up while her daughter was dusting the furniture.
7. My friend was skipping while I was looking for my glasses.
8. Why were you looking for the newspaper when I came in?
9. I was learning a poem by heart when father asked me to buy some bananas.
10. Was it raining at 5 o'clock yesterday?