Cách sử dụng
"Call back" means to contact someone again after you have spoken to them already. For example, if you called your friend and they didn't answer, you might need to call them back later to try again. Or, if you had a job interview, the employer might tell you they will call you back to let you know if you got the job. It's important to remember to call back if you say you will, to show that you are reliable and respectful.