阅读下面短文，然后根据短文内容简要回答下列问题
Most people drink tea in the world. But tea does not mean the same thing to different people. In different countries, people have different ideas about drinking tea.21
In China, for example, tea is often served when people get together. Chinese people drink it at home or in tea houses at any time of the day. They often use hot water to boil tea leaves.21
Tea is also important in other Asian countries. People in these countries have a special way of serving tea. They hold a tea ceremony in their houses when important guests come. It is very old and full of meaning. Everything must be done in a special way in the ceremony. There is even a special room for it in their houses.
In the United States, people usually drink tea at breakfast or they drink it after meals. Americans usually use tea bags to make tea. This way is faster and easier than the way of making tea in teapots. In summer, most Americans drink iced tea. They like to put some ice in their tea..Do most people drink tea in the world?
2.What do Chinese people often use to boil tea leaves?
3.When do people usually drink tea in the USA?
4.What kind of tea do most Americans drink in summer?
5.What does the underlined word “It” mean?