People travel in it.
举一反三
- The main interest of travel companies dealing with travel medicine is to A: prevent people from falling ill. B: make money out of it. C: give advice on specific counties. D: get the government to pay for it.
- You travel by it.
- You travel in it.
- According to the text, travel is good in that it brings people ____.
- How do people travel in North America?