Task 3. put the verbs in brackets into the past simple. 11. last summer i (go) to canada on holiday. 12. it (be) an unforgettable trip. 13. i (visit) many interesting places. 14. the weather (be) fine. 15. it (not/rain) .

11. went (V2);
12. was (V2);
13. visited (Ved);
14. was (V2);
15. didn't rain.

для этого вспомни пару формул PS:
+ – V2/Ved
- – didn't + V1
? – Did...V1?