9. The kittens were sleeping … a) while the mother cat was stealing a steak. b) while the mother cat stole a steak. c) while the mother cat was stole a steak.

Перевод задания: Котята спали …

Правильный вариант: a) while the mother cat was stealing a steak (пока мама-кошка крала стейк). Past Continuous описывает два действия, происходивших одновременно.

The kittens were sleeping while the mother cat was stealing a steak.

Котята спали, пока мама-кошка крала стейк.