阅读下列短文，从每题所给的四个选项(A、B、C和D)中选出最佳选项。
The four travelers see a beautiful green light in the sky in front of them.
"That's the Emerald （翡翠） City, "Dorothy says. "Come on!It isn't far now. "Soon they come to a big green wall. There's a gate in it. It's shining in the afternoon sun. Dorothy looks at it carefully. It's made of emeralds!She knocks on the gate. The gate opens and they all go inside. A little man in green clothes is standing there with a big box.
"What do you want in the Emerald City？"he says. "We want to see the Great Oz, "Dorothy answers. "It's important, "the Scarecrow says.
"I am the Keeper of the Gate, "the little man in green says. "I can take you to his Palace. But before you go there, you must put on these glasses. "He takes five pairs of glasses out of the box. The glass in the glasses is emerald green.
"Why？" Dorothy asks.
"Everyone in the Emerald City wears them, " the Keeper of the Gate says.
They put on the glasses. Then the Keeper takes out a big gold key and opens another gate. Dorothy is surprised. Everything is green--the houses and the streets. The sky is also green. Children are buying green juice with green money. Men in green clothes are driving green cars along the green streets. Everybody is smiling.
The Keeper of the Gate takes them to a big building in the middle of the city. Oz cannot see them today, so they must stay in the Palace for a few days.
A young girl takes them to their rooms. These rooms are beautiful and comfortable. They feel very tired now. . . .
一 Taken from The Wonderful Wizard of OZ
