1. (I, make) dinner when he arrived.

2. At 7 o'clock, (I, not, bake) a cake.

3. When I arrived (he, take) a shower.

4. Jim sent me a message this morning while (I, wait) for the bus.

5. (you, mow) the grass when the phone rang?

6. (We, have) breakfast when he called.

7. She was at home, but (she, not, clean) the room.

8. My computer shut down unexpectedly while (I, write) an e-mail.