Setze die richtige Form des Simple Past ein.

Yesterday it (to be) my friend´s birthday. He (to invite) a lot of friends from school.
It (to be) very hot so we (to decide) to go to the swimming pool.
The swimming pool (not to be) full so we (to swim) a lot.
Suddenly Joe (to fall) and (to hurt) himself.
We (to call) an ambulance.
He (not to stay) in hospital but he (to have) a broken arm.