While my friends ... (PLAY) in the park, I ... (STUDY) for a test.
WERE PLAYING / WAS STUDYING
Mum ... (READ) a book while grandma ... (WATCH) TV.
WAS READING / WAS WATCHING
While Joe ... (WASH) the dishes, Jack and Jill ... (DO) the homework in their rooms.
WAS WASHING / WERE DOING
The ghost ... (MAKE) a sandcastle while Gerry ... (SWIM).
WAS MAKING / WAS SWIMMING
While the chicks ... (SING), the dog ... (EAT) a bone.
WERE SINGING / WAS EATING
While the teacher ... (EXPLAIN), the kids ... (TALK).
WAS EXPLAINING / WERE TALKING)
Dad ... (PAINT) the garage while mum ... (CLEAN) the house.
WAS PAINTING / WAS CLEANING
While Sponge Bob ... (LISTEN) to music, Mr Krabs ... (CUT) pictures.
WAS LISTENING / WAS CUTTING
Phoebe ... (RIDE) her bike while Alex ... (CLIMB) a tree.
WAS RIDING / WAS CLIMBING
Harry ... (PUT) up the tent while Katie ... (COLLECT) water from the river.
WAS PUTTING / WAS COLLECTING