Present Perfect or Past Simple?

I ___________ ( see ) three police cars this morning.

• 've seen

• saw

I ________ ( break ) a glass

• 've broken

• broken

I ________ ( be) in London for three years.

• 've been

• was

We ________ ( see ) Julie last week.

• seen

• saw

He ______ ( be) a teacher before he became a musician.

• was

• been

When the boss walked into the room we ______ (know) that he got fired.

• known

• knew

The children __________ ( break ) a window last three years.

• broke

• broken

He ______ ( see) the movie last year.

• saw

• seen

Lucy ________ ( break) her leg, so she can't come playing.

• 's broken

• was broken

Julie _________ (arrive) . Come and say hello.

• 's arrived

• been arrived