present perfect simple vs past simple 2 - tutto inglese - Imparare l'inglese gratis on line

Police (establish) the cause of the accident yesterday.
I (not/travel) in South America yet.
Michelle (fall) and (graze) her knee ten days ago.
I (not/bring) my books yet.
Jason (prove) his innocence last month.
Martin (not/cook) at all in the last few weeks.
The headmaster (expel) five students from the school a month ago.
Tom already (put) his pen in his pocket.
Pete just (break) his leg in a skiing accident.
That film, we (see) yesterday, (terrify) us.