Поставить глаголы в скобках в нужное время
1.The old lady was happy: she (not to see) her son for three years.
2.Last night he (to finish) the book which he began writing a year ago.
3.The lesson (not yet to begin) and a children were talking loudly in the corridor.
4.Victor asked me to explain the new rule to him as he ( to miss)the previous lesson.