check|checked|checking

我完成考试后，检查了我的答案以找出错误。

After I'd finished the exam, I ___checked my answers for mistakes.

你能检查一下车是否准备好了吗？

Could you ___check if the car is ready?

请确认一下会议何时开始。

Please ___check when the meeting starts.

老师正在仔细检查学生的作业。

The teacher is ___checking the students' homework carefully.