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1.

was travelling

fell down

broke

wasn't looking

hurt

died

was raining

fell asleep

was sleeping

was chasing

2.

was studying; came

was walking; met

woke up; was cleaning

was working; phoned

were having; started

saw; were going

fell; was climbing

was walking; saw

burned; was cooking

fell; was reading

3.

ate

spoke

was/were

thought

told

sang

wrote

began

put

cut

knew

kept

lost

bought

won

chose

slept

understood