1. Match to make sentences. 1) There was a fire drill while we … 2) We were singing … 3) We were walking outside when we … 4) I saw smoke outside … 5) I was measuring liquids when … 6) The fire engine arrived while … a) realised it was an emergency. b) the fire started. c) we were waiting in the playground. d) were rehearsing for a concert. e) while I was doing a science experiment. f) when we heard the alarm.

Перевод задания: Соедини части, чтобы составить предложения.

1. There was a fire drill while we were rehearsing for a concert. (Была учебная пожарная тревога, пока мы репетировали концерт.)
2. We were singing when we heard the alarm. (Мы пели, когда услышали сигнал тревоги.)
3. We were walking outside when the fire started. (Мы гуляли на улице, когда начался пожар.)
4. I saw smoke outside while we were waiting in the playground. (Я увидел(а) дым на улице, пока мы ждали на игровой площадке.)
5. I was measuring liquids when I was doing a science experiment. (Я измерял(а) жидкости, когда проводил(а) научный опыт.)
6. The fire engine arrived while we were doing a science experiment. (Пожарная машина приехала, пока мы проводили научный опыт.)

В предложении 5 к началу “I was measuring liquids when” подходит окончание “while I was doing a science experiment” по смыслу, однако сочетание when… while звучит неестественно. Пара 4–e грамматически и смыслово подходит лучше: “I was measuring liquids while I was doing a science experiment.” Поэтому для полного соответствия каждому фрагменту используем пары 1–d, 2–f, 3–b, 4–e, 5–a, 6–c:

1. There was a fire drill while we were rehearsing for a concert. (Была учебная пожарная тревога, пока мы репетировали концерт.)
2. We were singing when we heard the alarm. (Мы пели, когда услышали сигнал тревоги.)
3. We were walking outside when the fire started. (Мы гуляли на улице, когда начался пожар.)
4. I saw smoke outside while I was doing a science experiment. (Я увидел(а) дым на улице, пока проводил(а) научный опыт.)
5. I was measuring liquids when we realised it was an emergency. (Я измерял(а) жидкости, когда мы поняли, что это чрезвычайная ситуация.)
6. The fire engine arrived while we were waiting in the playground. (Пожарная машина приехала, пока мы ждали на игровой площадке.)