Я вставила артикли,правильно?

After a long walk Dorothy and her friends came to a great freen(??? наверное, green?) wall. The wall was high and thick and it went around the Emerald City. There was a gate in the wall. Dorothy knocked at the gate. When the gate opened they saw a little man in a green suit. Near him there was a large green box. When the man found out why Dorothy and her companions wanted to see the Wizard, he said he was not sure it (???,наверное, if?) the Great Wizard would see them. He said that the Wizard never left the palace. He sat in the Great Throne Room and never went out for a walk.

Да, с артиклями порядок, исправь опечатки.

Не-а. Лениво править. Просто запомни: "the"-типа, "a" -конкретно

After a long walk Dorothy and her friends came to a great Green wall. The wall was high and thick and it went around the Emerald City. There was a gate in the wall. Dorothy knocked at the gate. When the gate opened they saw a little man in a green suit. Near him there was a large green box. When the man found out why Dorothy and her companions wanted to see the Wizard, he said he was not sure iF the Great Wizard would see them. He said that the Wizard HAD never left the palace. He sat in the Great Throne Room and never went out for a walk.

PS А с артиклями всё в порядке...

Все верно, на мой взгляд.