Помогите, пожалуйста. Я не знаю, где использовать past simple, а где present perfect

1 Italy won the World Cup in 2006.He's happy because States United have won all their matches this year. 2 Can you tidy your room? I have tidied it this morning. Can you tidy your room? I have tidied it.3 What time did you arrive home last night? Has Ben arrived? Yes, he's in the living room. 4 Come on, let's eat. Dad has cooked dinner.Who has cooked this food? It's delicious. 5 I have met lots of interesting people since I arrived. Did you meet anyone interesting while you were on holiday?

1a    won1b    States? have won2a   have tidied2b   have tidied3a    did you arrive3b    Has Ben arrived4a    has cooked4b    has cooked5a    have met5b    Did you meet