1. I saw a lot of Russian cartoons.
What Russian cartoons did you see?
2. We visited a lot of museums.
What museums did you visit ?
3. We were on exciting excursions.
Where was these excursions?
4 I used some rides in Gorky Park
When did you use some rides in Gorky Park?
(точно не знаю,как будет кататься на аттракционах)
5. I know how to cook some traditional Russian food
What traditional Russian food can you cook?
6 I bought a lot of souvenirs in the Detsky Mir Shop.
What souvenirs did you buy in the Detsky Mir Shop ?
2. to save - to keep something safe, not to spoil something
3. to waste - to spend useless ( time ), to spend for nothing , to use sometime wasteful.