Раскрыть скобки в активный или пассивную конструкцию:
1) This text (to translate) at the last lesson
2) I (to ask) the teacher to help me
3) Many houses (to burn) during the Great Fire of London
4) I often (to send letters to my friend)
5) My friens (to help) me in Maths
6) These trees (to plant) last summer