Present Perfect vs Past Perfect

They ..... already..... to London.

Max ..... dinner by 4 o’clock.

I ..... to the office before lunchtime.

Who ... you this disc?

 Here are your shoes. I  .......just them.

What's that lovely smell in here? - Jasmin ..... a yummy cake.

Molly suddenly remembered that she ... her mobile phone at home.

Where is the cake? The dog ....... it all.

Girls....an invitation for the party before Friday.

Where is dad? - He .... to the supermarket.

The children ...already... supper when their parents came home.