Put the verbs in brackets into the past simple or the past continuous.

2 was cleaning, was working

3 found, was playing

4 was having, came

5 was knitting, was smoking

6 arrived, was painting

7 were walking, started

8 were you talking, came

9 was reading, knocked

10 was washing, cut

11 broke, was dusting

12 was building, was swimming

*Для действий в процессе (незаконченных/длительных действий) используем Past Continuous.

Для однократных ("быстрых") действий в нужно брать Past Simple.