When I confirmed the transmission of the letter again, it was found that the transmission was not successful! I am really sorry that the teacher waited a long time.
When the letter was confirmed again, it was found that it was not delivered successfully! I'm really sorry to have caused the teacher to wait a long time. ...
When reconfirming the transmission of the letter, I found that the transmission was not successful! I'm really sorry to have kept the teacher waiting for a long time.<br>