put sb. on his best behavior

例句：

1. 1. She put her son on hisbest behavior by giving him a stern lecture.
   她通过严厉的训斥来激励她的儿子表现得最好。
2. 2. The teacher put thestudents on their best behavior for the finalexam.
   老师要求学生们在期末考试时表现得最好。
3. 3. The manager put all employees ontheir best behavior to ensure a smooth operation.
   经理要求所有员工都表现得最好，以确保运营顺畅。