Match the numbers to the letters and write sentences using relative pronouns (who, which, whose, where, when, or why).

1. We went to Paris, which is a beautiful city. 2. A barometer is an instrument, which measures atmospheric pressure. 3. 1799 is the year when the event happened. 4. This restaurant is the place where we had dinner. 5. An astronomer is a scientist who studies celestial objects. 6. An octopus is a sea creature which has eight arms. 7. The last time we met was the reason why I remembered the story. 8. This is the reason why I decided to come.