C. Join the sentences using when or while. 1. Thomas was talking on the phone. The accident happened. 2. We heard a noise. We were walking in the forest 3. Becky was doing her homework. Alice was surfing the Net 4. I saw the huge dog. I ran for help 5. Mary was on the bus. Her brother called her 6. Luke was making a salad. His sister was making sandwiches.