题目内容：

英语划线句子提问
We had had the toys for ten years before we gave them to the child.
画线：for ten years
they began to climb the mountain after they had bought all the food and drink（用 until 改写句子）

优质解答

How long had you had the toys before you gave them to the child?

追问：

they began to climb the mountain after they had bought all the food and drink（用 until 改写句子）

追答：

They didn't begin to climb the mountain until they had bought all the food and drink