. Make the sentences negative. 1. I (cook) dinner when the telephone rang. 2. Diana (play) the piano when her brother entered. 3. We (read) the text when Tom came in. 4. They (study) in the library when suddenly it started to rain. 5. Pete (make) noise when he was at the lesson. 6. When I woke up this morning it (snow) hard. 7. The managers (carry) on negotiations from 4 to 6 o’clock yesterday. 8. You (go) on a business trip to Italy this time last year. 9. At that time they (sit) at supper. 10. I (think) about my project the whole day.