Сделать предложение вопросительным 1. the expedition is returning next week. (when) 2. we are doing grammar exercises now. (what) 3. the mother is teaching her little son to read. (who) 4. i am reading a book on modern art. (what) 5. they were still arguing when i entered the room. (who) our group was staying in vitebsk for some days. (for how long) we were talking and he was listening to the radio. (what) they will be moving to a new fl^it this month. (when) 9. we shall be listening to petrov at the concert. (when) 10. he is coming tomorrow. (when)