Present perfect vs past simple

1. Oh no! I lost my keys!.               2. Oh no! I've lost my keys.          

1. We never saw this film.            2. We have never seen this film. 

1. Have you been to school yesterday?                                          2. Were you at school yesterday?

1. Oh gosh! My dog ate my sandwich!                                            2. Oh gosh! My dog's eaten my sandwich!

1. I was in London two years ago.                                                         2. I have been to London two years ago.

1. Harry left home at 10.00.        2. Harry has left home at 10.00.

1.Have you seen my wallet? I've lost it.                                                            2. Did you see my wallet? I've lost it.

1. Where did you go on holidays last summer?                                    2. Where have you gone on holiday last summer?

1. Did you eat spaghetti in the evening?                                               2. Have you eaten spaghetti in the evening?

1. Did you ever eat octopus?       2. Have you ever eaten octopus?

1. I visited my Grandparents at Christmas.                                           2. I've visited my Grandparents at Christmas.

1. Has Jim ever written a book? 2. Did Jim ever write a book?