Hello, I don't know where you go to school, but usually the tutor is obliged to ask or care about the progress when taking the students. On the other hand, if you can't reply normally or your thesis fails, it will have a great influence on your tutor. This has little to do with whether you take the self-study exam or not, and it is no problem for the teacher to use the email, because the tutor is very busy at ordinary times and you are not the only one who takes the students. Maybe your mind is really not on you.

For example, in a text message, you can say: Teacher, you have taken care of you for a long time. Students have been studying hard under your training, and now they are about to submit the first draft (thesis defense). Students don't want to hurt their teachers' reputation, so they work hard. However, due to the limited strength of students, some problems have been encountered at present. I would like to ask the teacher to take some time to read my paper, and thank you very much for your guidance again.

You can say that, and then try to visit the teacher, go to his office or something, ask your preferences and send something. It doesn't have to be too expensive, because he doesn't necessarily like what you send, mainly communication. If the teacher doesn't know who you are, how can he talk about marking your paper?

I hope it is useful to you, and I hope to adopt it ~