1 . What were you doing at 6 o'clock yesterday evening?

2. They were waiting.........

3. are playing

4am revising

5 is knocking

6 are flying

Ответ:

1) What were you doing at 6 o'clock yesterday evening?

2) They were waiting for the bus when the accident happened.

3) The boys are playing in the garden.

4) I am reviewing my lessons now.

5) Somebody was knocking at the door.

6) The birds are flying in the sky.

Объяснение: