Where you grew up (Ages 0-18): northern California, USA
1. A body of water, smaller than a river, contained within relatively narrow banks: creek or stream. Both of which have long e's.
2. What the thing you push around the grocery store is called: Shopping cart.
3. A metal container to carry a meal in: Lunch box.
4. The thing that you cook bacon and eggs in: Skillet.
5. The piece of furniture that seats three people: Couch or sofa. Sofas are fancier.
6. The device on the outside of the house that carries rain off the roof: Gutters.
7. The covered area outside a house where people sit in the evening: Porch. If it's uncovered it's a patio, unless it's raised off the ground, then it's a deck.
8. Carbonated, sweetened, non-alcoholic beverages: Soda. Soft drinks on menus or if you're trying to sound hoity-toity.
9. A flat, round breakfast food served with syrup: Pancake. Unless it's an Eggo waffle. But I think it's asking for pancakes here.
10. A long sandwich designed to be a whole meal in itself: Sub.
11. The piece of clothing worn by men at the beach: Shorts or (swim) trunks.
12. Shoes worn for sports: Tennis shoes or tennies.
13. Putting a room in order: Cleaning/straightening.
14. A flying insect that glows in the dark: Firefly. We don't have these here.
15. The little insect that curls up into a ball: Roly-poly. Haven't seen one of those in a long time.
16. The children's playground equipment where one kid sits on one side and goes up while the other sits on the other side and goes down: Seesaw or teeter-totter.
17. How do you eat your pizza: Pointy end first. What does this have to do with English?
18. What's it called when private citizens put up signs and sell their used stuff: Garage or (less common) yard sale, estate sale if it's selling a deceased relative's stuff.
19. What's the evening meal?: Dinner.
20. The thing under a house where the furnace and perhaps a rec room are: Basement. We don't have these, either.
21. What do you call the thing that you can get water out of to drink in public places: Water fountain or drinking fountain. Scuttlebutt if you're around boat people.