Пожалуйста, помогите!!! Очень срочно!!!
Have you met/Did you meet the new teacher yet?
When did you learn/have you learnt to ski?
He has taken/have taken lots of photographs today.
We have not had/did not have an exam last week.
When you went on the school trip, have you visited/did you visit the museum?
I never did/have never done a chemistry experiment before.