Complete the sentences with the correct form of the Present Perfect.

We (invite) many friends to our party.

They_______ (never / climb) a mountain.

I am tired. I _______(be) very busy.

______(you / ever / stay) in a castle?

I want to h a party on the beach.

I want to go to Egypt, see the pyramids and r_____ a camel.

I want to go s_______ diving in the sea and see the fish.