What is the function of Present Perfect Tense?

Fred is a very close friend of mine. We ________ each other for years.

Do you know what time Sarah _________ the office?

You ________ late for work too many times this year. If you’re not careful you’ll be fired.

We ________ an exchange student from Russia who _______ the sea so we’re taking him to a beach this weekend.

I __________ quite a few financial problems last year but this year things are getting better.

I __________ to be a writer_________ I was a child.

A: 'Where's Celine?' B: 'She ___________.'

I ___________ (stain) my suit, but I ___________ (send) it to the dry-cleaners and it looks OK.

I ___________ (visit) Greece 3 times since my friend ___________ (move) there 3 years ago, and I love it!

Jackie sent off more than 20 job applications last month, but ___ she hasn't had any replies.

He promised to write to me once a week but _______ I've only received a postcard.

A: Liz is looking very healthy these days. B: Yes, she's _________ started yoga classes.

A: Have you __________ been in a helicopter? B: Yes. Once was enough!

I __________ (receive) 25 emails this morning, most of them spam!

Your hair looks nice. Have you _______ to the hairdresser's?

Keith's ________ to the shop to get some bread. He'll be back in five minutes.

Where's my passport _________? I can't find it anywhere.

A: _______ (you/see) my keys today? B: Yes. I _______ (see) them this morning on the kitchen table.

I honestly think that the time ________ come when we should celebrate our success.