1) The price of tickets is much higher than usual because there are a lot of people who want to buy tickets.
2) How much do you have to pay per day to eat at the foreign students' cafeteria?
3) How does a student who receives no scholarship money and does not work support himself without an income?
4) When I went to the United States, I went to visit many museums. Generally speaking, the ticket salespeople were very polite to foreigners; therefore, I was not treated unfairly.