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 yearsthey began to climb the mountain after they had bought all the food and drink（用 until 改写句子）
问题描述：
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）
答