check crossed generally

例句：

1. 1. Before leaving the office, I always make 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. The teacher checked the students' homework before class.
   老师在上课前检查了学生的作业。
3. 3. She checked her phone for any missed calls before leaving the house.
   她离开家前检查了她的手机，看是否有未接来电。