Bài 4:
1, was swimming/started
2, phoned/were playing
3, was walking/saw
4, bought/playing.
5, was watching/took.
6, were flying/came.
7, was making/was taking/ was cleaning/was playing.
8, was doing/arrived.
Bài 5:
1, I watched it with my family.
2, We were dancing, eating/drinking.
3, We lied on the beach every day.