Какое построение предложение верное?
1.How (she pays) for college?
How (will she pay) for college?
How (should pay) for college?
How (she's going to pay) for college?
2. We didn't eat here last week, **** we?
2.1 didn't
2.2 haven't
2.3 do
2.4 did
И Обязательно пояснение , почему так?