(3) Complete the sentences with when or while. Sometimes both are possible. 0. When mom was frying fish, she burnt her hand. 1. *** I was roller skating, my friends were riding their bicycles. 2. I was still playing the piano *** everybody started clapping. 3. Elnur hurt his leg ★★★ he was playing football. 4. Ulvi and Kamil were waiting at the bus stop *** the rain started.​