pronominalisation

i saw the cat. it was sleeping.

the teacher gave us the books. she handed them to us.

john lost his keys. he couldn't find them anywhere.

my mother called. she said she would come tomorrow.

the children are playing in the park. they look happy.

i met mary yesterday. she told me about her job.

the book is on the table. you can take it.

my friends arrived. they brought their guitars.

the dog bit the postman. it was very aggressive.

sarah finished her work. she submitted it online.

the students finished their exams. they were relieved.

i bought a new car. it costs a lot of money.