Past simple vs. past continous:
1.She (work) in the garden all day yesterday.
2.I (be)in the class while they (play)ball .
3.The post man (ride) his bike when the dog (attack) him.
4.I (study) at 6 p.m yesterday.
5.While Daniel (drink) coffe,Peter (look) at him.
6.I (bake) a cake when the telephone (ring).
7.She (not do) her homework yesterday afternoon.
8.Claire (break) a glass while she (do) the washing-up.
9.Dina (speak) with Tom on the phone while I (try) to ring her.
10.Tom (walk) in the park when in (start) raining.
11.James (drive) his car when he (get)a flat tire.
12.It (snow) hard while Tom (come) back home.