The Past Simple or The Present Perfect Tense?

I ..... my friend in the park recently.

Where .... my pen? I can't see it.

When .... the vase?

She .... from Rome.

We ..... these books from the library.

He .... here an hour ago.

....... you ...... to a new flat already?

We ..... there three weeks ago.

My brother ..... a new camera.

He ..... it yesterday

..... Nelly already ..... to her motherabout the party?