1. The bear was eating the bread when Julie entered the tent!
Ответ: was eating
2. He passed the exam without difficulty.
Ответ: passed
3. David was riding his bicycle while Kevin was skateboarding.
Ответ: was riding
4. Steve got dressed, had breakfast and then went to work.
Ответ: got
5. She was cooking when the lights went out.
Ответ: was cooking