Based on the provided text and questions, here are the best answers:

1. **What does the writer say about international tourism?**
- **B. It costs a lot of money.**

2. **When did international tourism become popular, according to the writer?**
- **A. In the 19th century.**

3. **How many forms of transport connected with international tourism does the writer talk about in paragraph 2?**
- **C. Three.**

4. **What does "them" mean in paragraph 3?**
- **D. Languages.**

5. **Which of these things does the writer say about international tourism?**
- **A. English has always been the language of international tourism.**

If you have any specific details you'd like to explore further or need clarification on any point, let me know!