1. What are you doing? - We are preparing for the concert. 2. Where are you going? - I'm going to the library. 3. Where is Nicholas? - He's in the reading room. Is doing his homework there. Nicholas often does his homework in the reading room. 4. Is Lena at home? - No, it's not at home. She is having a music lesson. She always has music classes at this time. 5. Do not make noise. Kovalenko is speaking on the telephone. 6. Do not go into that room. There's a group of our students sitting a Maths exam. 7. Students sit examinations twice a year. 8. His son is going to become an economist.