4. A. in a museum B. in a college C. in a radio station

5. A. in a museum B. in a college C. in a radio station

6. A. in a museum B. in a college C. in a radio station

7. A. in a museum B. in a college C. in a radio station

8. Am/Br differences: college Differences between British and American English: college In the UK, a college usually means a place where students over the age of 16 are trained in a particular subject or skill, earning a qualification that is not usually an academic degree. People studying for an academic degree go to a university. In the US, a college is a place where students can earn a bachelor's degree (=first degree), and a university offers both bachelor's degrees and advanced degrees. http://www.macmillandictionary.com/dictionary/british/college

9. B. in a college