Put the verbs into the correct tense, past simple or present perfect

Put the verbs into the correct tense, past simple or present perfect.
1.    _____________ (you/ ever/ be) to the United States ? - No, but I _____________ (be) to England and France.
2.    When we were in Canada, we _____________ (go) skiing almost every day.
3.    When _____________ (you/ meet) your wife? - 3 years ago.
4.    Peter _____________ (not phone) yet. I’m still waiting.
5.    I _____________ (know) Helen since we were at school together.