1. Choose the correct variant: While I did / was doing my homework, my sister listened / was listening to music. 2. I walked / was walking past the Chemistry Room when the door opened / was opening and a student ran / was running out. 3. While we did / were doing the Maths test, Oleg fell / was falling off the chair. Everybody started / was starting laughing. 4. The students had / were having their Science lesson at 1:30 p.m. yesterday. They studied / were studying the first law of Newton when somebody’s phone rang / was ringing. 5. When the ICT teacher came / was coming into the classroom, the students played / were playing computer games. 6. While Ivan Olegovich wrote / was writing a formula on the board, a huge bee…

Перевод задания: Выберите правильный вариант.

1. While I was doing my homework, my sister was listening to music. (Пока я делал домашнее задание, моя сестра слушала музыку.)
2. I was walking past the Chemistry Room when the door opened and a student ran out. (Я проходил мимо кабинета химии, когда открылась дверь и выбежал ученик.)
3. While we were doing the Maths test, Oleg fell off the chair. Everybody started laughing. (Пока мы писали контрольную по математике, Олег упал со стула. Все начали смеяться.)
4. The students were having their Science lesson at 1:30 p.m. yesterday. They were studying the first law of Newton when somebody’s phone rang. (Вчера в 13:30 у учеников был урок естествознания. Они изучали первый закон Ньютона, когда у кого-то зазвонил телефон.)
5. When the ICT teacher came into the classroom, the students were playing computer games. (Когда учитель информатики вошёл в класс, ученики играли в компьютерные игры.)
6. While Ivan Olegovich was writing a formula on the board, a huge bee… (Пока Иван Олегович писал формулу на доске, огромная пчела…)

Длительное действие, происходившее в определённый момент или служившее фоном, выражается Past Continuous; завершённое событие, прерывающее его, — Past Simple. В предложении 6 продолжение обрезано, поэтому доступен только выбор формы глагола was writing; для перевода и выполнения продолжения нужен полный текст.