Не (finish) the first part of his book and now he (write) the second. He (work) at his book for two years.
17. She (have) a bath at seven o'clock last night.
18. Linda also (answer) telephone calls, sometimes she (show) visitors around the factory.
19. The library (close) by the time I (get) there.
20. She (look) at him while he (read) a newspaper.
21. Hurry up, Jane! We all (wait) for you.
22. The scientists (carry) out many experiments before they (achieve) satisfactory results.