It's necessary to take some time to choose the subjects. The first two weeks, the best an international student can do it's meeting the teachers in order to explain them why he or she is at this university, the type of convention he or she is in ( Erasmus,etc..) and to knox how the course will develope.
Of course,it's worthy assisting the courses. Even if you have to ask other students to lend you their notes, to get a complete comprehension. And overall, because it improves your language skills (listening to a native speaker, taking notes and increasing your vocabulary in the field you study).
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