In DaDa (DaDa English) class, what should I do if the teacher has something to do and cannot come to class?

If a teacher cannot come to work, almost every English learning institution will do this:

Inform the students of the reason in advance, and the learning institution will reschedule the next class, and no deduction will be made this time class.

Inform students of the reason in advance and they can choose to make an appointment with another teacher.

The above is how the teacher can't attend class on time. If you can't attend class on time, you must inform us, otherwise the corresponding class hours will be deducted.

If you agree with what I say, just adopt it!