Fill in the prepositions where necessary:
1. First-year students work hard to master… the language.
2. What mark did you get … Mathematics … entrance exams?
3. What mark did you get … your report?
4. My friend was very good … Kazakh.
5. What kind of sports did he go … … when he was a freshman?
6. He was good … tennis.
7. Helen invited her friends … her birthday party.
8. When the lecturer entered … the classroom the students stood up.
9. When will you make your report … the conference?
10. They will join … sports society next month.
11. I shall speak … the assistant-dean.
12. He will be a member … the students’ English club.
13. My sister will pass the entrance exams … the university … excellent marks.