Question

When I ( to open ) the door of the classroom, I ( to see ) that the teacher already ( to come ) and the pupils ( to write ) a dictation​

Answer 1

Ответ:

When I opened the door of the classroom, I saw that the teacher had already come and the pupils were writing a dictation​.

Объяснение:

Answer 2

When I opened the door of the classroom, I saw that the teacher had already come, and the pupils were writing a dictation.