Réponse :

1.

a. John, the buttler was cleaning the library.

b. Mary, the cook was making scones.

c. Gary, the gardener was planting tomatoes.

2.

a. Were you sleeping at 9:00am this morning ?

b. Where was he going when he found the body ?

c. What were they doing in the garden ?

3.

a. I was taking a walk when I saw a terrifying dog.

b. When the police arrived, we talked and played cards in the garden.

c. They weren't working when I got home.