Решение:
Вставляем пропущенные предлоги, чтобы предложения были грамматически верными и имели смысл.
- Alice was in a very large room now.
- She saw a table and a little gold key on it.
- The key was too large for some of the doors and too small for the others.
- Alice wanted to get into the beautiful garden.
- She sat down on the floor and began to cry.
- Then she noticed a little box on the table.
Ответ: 1. in; 2. on; 3. for, for; 4. into; 5. on; 6. on.