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OSD Test B1 Certificate The OSD test B1 certificate is a great way to show off your German language skills. It is a widely recognized test that is based on CEFR standards. The exam consists of oral and written tests. Candidates can take the tests on their own, or in combination. It is important to prioritize the tasks you have to complete for your exam and to practice frequently. It is also important to use techniques to relax and remain calm throughout the exam. Benefits OSD is a language certific
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