他是以大一统王朝使臣身份开域外交通路线的第一人，经过他的探险，形成了丝绸之路，造福当世，泽及后人。这里的“他”指的是（   ）

从这四个人中选择一人参加奥运会射击项目比赛，最佳人选是（  ）

    I climbed mountains with my friends last Sunday. It was very hot. When we climbed halfway up the mountain, we were very hungry and thirsty. We decided to have a rest. My friends bought some water and fruit. I brought some bread and milk. We were very happy. Finally, we were on the top of the mountain. But my hat was flew away. I was sad

    It was a happy and sad day.

下列古语中能体现尊重他人，平等待人要求的是（    ）