Odpowiedź:
ćwiczenie 1
1. when
2.while
3.when
4.when
5.while
6.while
7.when
8.while
9. when
10. when
ćwiczenie 2
1.was riding
2.were looking
3.arrived
4.fell
5. was cooking
6. dałabym obie formy, ale raczej będzie: was opening
7. went
8. were runing
9. was raining
10.walked
