Choose the right verb forms to complete the sentences.

Choose the correct option.

The girl [sit|was sitting] on the grass in the park, reading a fiction book.

The policeman entered the hall and [noticed|was noticing] strange steps on the carpet.

The accident happened because the man [drove|was driving] and talking on his mobile phone at the same time.

While I [did|was doing] my maths homework, I decided to walk with my friends after finishing it.