Present Perfect and Past Simple contrast

The coach isn't here. It has already .....

Rosie ......... her leg three months ago.

The Olympic Games ...... last week.

They're cheering because their best player ....... a goal.

I ........ my homework yet.

Fernando Alonso........ the world motor racing champion when he was aged only 24.

We ...... at the top of the league since the start of the season.

......... yet?

We .......... to London together last week.

........ to Dan since the party?

I ­ .......... learning English two years ago.

I ...... Terry since we were children.