Here are the completed questions:

1. How often does Peter go swimming?
- Peter goes swimming three times a week.

2. How many languages does he speak?
- He speaks German, Spanish, and Russian.

3. Why are you crying?
- I'm crying because I'm so upset today.

4. Where do they usually spend their weekends?
- They usually spend their weekends in the country.

5. When is Kate going on holiday?
- Kate is going on holiday at the end of the month.

6. What time does Paul finish his work?
- Paul finishes his work at 6.30.

7. What is he studying this term?
- He is studying English and Literature this term.