а) 1. The students are translating the sentences from English into Russian now. 2. The teacher is listening to them. 3. You are making a lot of mistakes in your answer. 4. You are always talking at the lessons. 5. They are leaving for Moscow tomorrow. 6. The economic situation is bad and it is getting worse.
б) 1. The secretary was typing the manager's report at 10 o'clock yesterday morning. 2. What were the children doing the whole evening? – They were swimming in the river. 3. Who was talking on the telephone at that time? 4. Who were you talking to when I came in? 5. My mother was weeding the flower beds while my father was cutting the grass. 6. It was raining the whole day yesterday.
в) 1. We shall be writing a dictation at two o'clock tomorrow. 2. The children will be sleeping when their parents come home. 3. I shall be decorating a new-year tree while my mother will be making a cake. 4. They will be discussing this matter at this time tomorrow. 5. The teacher said that we should be writing a test at 2 o'clock.