Помогите срочно... Исправьте ошибки в данных предложениях

Привет!

A.

1.What were you doing at 8 o'clock yeaterday?

2.Why were you talking to Ann when I saw you in the cafe yeaterday?

3.Last Saturday when it started raining some children were playing in the park.

4.The dog was running after the cat, when they saw an elephant.

5.The sun was setting and it was getting dark.

6.I was doing my homework when my friends came.

7.She was running quickly when she felt over.

8.They were going by taxi when they saw a bus coming to the bus stop.

9.They were swimming in the river when they saw a crocodile.

10.They were picking apples in the gardem when they saw an apple tree.