1. The three majors are not the best, only the most suitable. If you like translation, I suggest choosing a translation major instead of tourism translation or MTI. Because the latter two are still in the construction stage, they are not perfect and formal enough. If you are not a scholar student, applied linguistics is not recommended, which is rather boring.
2. Learning diesel engine maintenance, West Point cooking or tourism translation has the opportunity to be a teacher.
3. Applied linguistics covers a wide range, and you can choose the direction of second language acquisition, but you should also consider the research direction of the selected tutor.
4. Business English is a little better.