Раскройте скобки, употребляя глаголы в требующемся времени.

1. What you (to do) _____ when I (to come) in? 2. When I (to come) _____ to his house, they (to tell) me that he (to leave) _____ an hour before. 3. On checking up his answers he (to find) _____ out that he (to make) _____ several mistakes. 4. When I (to leave) _____ home, the snow already (to stop) _____ , but a strong wind (to blow) _____ . 5.You (to read) _____ this book? — Yes, I (to read) _____ it I (to think) _____ it (to be) _____ very interesting. 6. What the children (to do) _____ now? — Oh, they (to play) _____ a new table game which I (to buy) _____ for them the day before yesterday. 7. They (to reach) _____ the corner of the street by now and (to stand) _____ at the bus stop. 8. After we (to walk) _____ about two hours, we arrived at a picturesque glade covered with fresh grass. 9. We could not go out because it (to rain) _____ heavily since early morning. 10. She (to teach) _____ at our school for twenty years now. 11. Ring me up as soon as you (to come) _____ home. 12. He (to begin) _____ to write his composition at 3 o’clock. It is already 11, and he still (to write) _____ it. He says he (to finish)  _____ it by 12. 13. We (to help) _____ our librarian to put the books in the right order for already three days, but we (to arrange) _____ only half the books.