Контрольные задания > 5. When I (to enter) the classroom, the teacher (to write) words on the blackboard and the pupils (to copy) them into their exercise-books.
Вопрос:
5. When I (to enter) the classroom, the teacher (to write) words on the blackboard and the pupils (to copy) them into their exercise-books.
Ответ:
When I entered the classroom, the teacher was writing words on the blackboard and the pupils were copying them into their exercise-books.