Past Simple vs Present Perfect

Open the brackets, put the verb in the correct form. But I (already / travel) to London a couple of times.

Open the brackets, put the verb in the correct form. I (just / finish) my homework.

Open the brackets, put the verb in the correct form. Tom (move) to this town in 1994.

Open the brackets, put the verb in the correct form. (you / ever / see) a whale?

Open the brackets, put the verb in the correct form. (they / spend) their holiday in New Zealand last summer?

Open the brackets, put the verb in the correct form. Last week, Mary and Paul (go) to the cinema.

Open the brackets, put the verb in the correct form. I (not / be) to Canada so far.

Open the brackets, put the verb in the correct form. My friend (be) in Canada two years ago.

Open the brackets, put the verb in the correct form. I can't take any pictures because I (not / buy) a new film yet.

Open the brackets, put the verb in the correct form. Mary (already / write) five letters.