1 Underline the correct words. 1 Suddenly, all the lights in my house were going off / went off. There was heavy rain outside. 3 — I called you up at seven o’clock last night, but nobody answered it. — Really? I’m sorry, but I was teaching / taught a piano lesson at school. 4 — I was seeing / saw you and Tom in the library just now. — Oh, we showed / were showing several visitors around the school.