There are several things you can do to prepare for an exam.
1. don't cram the night before
2. try to avoid distractions
3. study with other people
4. ask the teacher for help throughout the semester/year
5. if you have taken good notes, study from them
6. outline your chapters throughout the year
7. use other sources to help you study if you are still confused about a certain thing
8. if your teacher has given you a study guide use that to help you prepare for the exam
9. visualize success
Hopefully this helps.
I believe that they have to participate in free trade with other nations.
Answer:
Naprawdę nie mogę tego uczynić, ale lider w okręgach federalnych nie zarabia tak dużo pieniędzy, jakie zarabia prezydent