30.绿野仙踪-11-7

Again the eyes looked at her sharply, and they saw she was telling the truth.
Then Oz asked, "What do you wish me to do?"
"Send me back to Kansas, where my Aunt Em and Uncle Henry are," she answered earnestly.
"I don't like your country, although it is so beautiful.
And I am sure Anut Em will be dreadfully worried over my being away so long."
The eyes winked three times, and then they turned up to the celliong and down to the floor and rolled around so queerly that they seemed to see every part of the room.
And at last they looked at Dorothy again.
"Why should I do this for you?" asked Oz.
"Because you are strong and I am weak; because you are a Great Wizard and I am only a little girl."
"But you were strong enough to kill the Wicked Witch of East," said Oz.
"That just happened," returned Dorothy simply; "I could not help it."
"Well," said the Head, "I will give you my answer.
You have no right to expect me to send you back to Kansas unless you do something for me in return.
In this country everyone must pay for everything he gets.
If you wish me to use my magic power to send you home again you must do something for me first. Help me and I will help you."
"What must I do?" asked the girl,
"Kill the Witch of the Weat," answered Oz.
"But I cannot!" exclaimed Dorothy, greatly surprised.
"You killed the Witch of the East and you wear the silver shoes, which bear a powerful charm.
There is now but one Wicked Witch left in all this land, and when you can tell me she is dead I will send you back to Kansas-but not before."