check on working conditions in the driver's cab

例句：

1. 1. Before leaving the office, I alwaysmake sure to check my email.
   离开办公室前，我总是确保检查一下我的电子邮件。
2. 2. Theteacher checked the students' homework before class.
   老师在课前检查了学生的作业。
3. 3.The police checked the crime scene thoroughly beforereleasing the suspect.
   警方在释放嫌疑人之前彻底检查了犯罪现场。