If it is an undergraduate thesis defense, it is best to ask the seniors. Different schools have different requirements, but in most cases, you will basically pass, at least not because of poor defense. More often, it is because of poor writing, such as plagiarism, such as too many problems in language expression, which is not like English writing at all.

The general process is that you will have a few minutes to state the main content of your paper, and then the teacher will ask a few questions about your paper.

The usual questions are the meaning of keywords in your paper, the significance of research, etc.

For English majors, the key is not to be speechless, but to speak like English, that is, to speak better. I emphasize that for English majors, teachers pay more attention to your English foundation and basically don't force or force you to improve your scientific research ability.

In short, be familiar with your thesis and practice some fluent spoken English. As long as the teacher allows you to participate in the defense, it is basically ok. If you want to be excellent or excellent, you should behave better when you answer (mainly speaking well).