Upon arriving at the airport, she immediately called her family to let them know she was safe. （一到达机场，她就立刻给家人打电话报平安。）

The cat jumped upon the table and started playing with the ball. （猫跳到桌子上，开始玩球。

） Upon hearing the good news, everyone in the room cheered loudly. （一听到这个好消息，房间里的每个人都大声欢呼起来。）

He placed the book upon the shelf carefully so as not to damage it. （他小心地把书放在书架上，以免损坏它。

） The decision was based upon a thorough analysis of the data. （这个决定是基于对数据的全面分析做出的。

） Upon opening the box, she found a beautiful necklace inside. （一打开盒子，她发现里面有一条漂亮的项链。

） The old man sat upon the bench, enjoying the warm sunshine. （老人坐在长椅上，享受着温暖的阳光。

） The success of the project depends upon our efforts and cooperation. （这个项目的成功取决于我们的努力和合作。

） She put her hat upon her head and went out of the house. （她把帽子戴在头上，走出了房子。

） Upon reflection, he realized that he had made a big mistake. （经过反思，他意识到自己犯了一个大错误。

） The bird landed upon the branch and began to sing sweetly. （鸟儿落在树枝上，开始甜美地歌唱。

） We must act upon the advice given by our teachers. （我们必须按照老师给的建议行动。

） The snowflakes fell gently upon the ground, covering it with a white blanket. （雪花轻轻地落在地上，给大地盖上了一层白色的毯子。

） Upon seeing his mother, the little boy ran towards her with open arms. （一看到妈妈，小男孩张开双臂朝她跑去。

） The theory is founded upon years of research and experiments. （这个理论是建立在多年的研究和实验基础上的。

） He laid the map upon the table and started to plan their route. （他把地图放在桌子上，开始规划他们的路线。

） Upon entering the museum, they were amazed by the beautiful exhibits. （一进入博物馆，他们就被精美的展品惊呆了。

） The responsibility lies firmly upon his shoulders. （责任牢牢地落在他的肩上。

） She relied upon her friends for support during difficult times. （在困难时期，她依靠朋友们的支持。

） Upon finishing his homework, he watched TV for a while. （一完成作业，他就看了一会儿电视。

）