1. 他的家境非常贫困，没有足够的钱去看医生。(so...that)
2. 他说，获得基本医疗服务对孩子们来说至关重要。(it is＋adj.＋for sb to do sth)
3. 他热爱学习，并且非常感谢世界卫生组织(WHO)对他的帮助。(grateful)
His family was so poor that they didn't have enough money to see the doctor.
2. 他说，获得基本医疗服务对孩子们来说至关重要。(it is＋adj.＋for sb to do sth)
He said it was very important for children to get basic health care.
3. 他热爱学习，并且非常感谢世界卫生组织(WHO)对他的帮助。(grateful)
He loves studying and is grateful to WHO for helping him.
答案：1. His family was so poor that they didn't have enough money to see the doctor.
2. He said it was very important for children to get basic health care.
3. He loves studying and is grateful to WHO for helping him.
2. He said it was very important for children to get basic health care.
3. He loves studying and is grateful to WHO for helping him.
解析：
翻译:
1. 他的家庭非常贫困，以至于他们没有足够的钱去看医生。
2. 他说，对孩子们来说，获得基本医疗服务是非常重要的。
3. 他热爱学习，并且非常感谢世界卫生组织（WHO）对他的帮助。
1. 他的家庭非常贫困，以至于他们没有足够的钱去看医生。
2. 他说，对孩子们来说，获得基本医疗服务是非常重要的。
3. 他热爱学习，并且非常感谢世界卫生组织（WHO）对他的帮助。