Questions 1-4 refer to the following student essay.

China is the biggest country on the planet. It is not the biggest in terms of its amount of land, but it is the biggest in terms of its number of people. A large Chinese city such as Shanghai always (1).... lots of people in the streets. Every day, the city center (2).... with people who are eating, shopping, and going to work. Shanghai was an important city during the Qing Dynasty when the city (3).... one of China's biggest seaports. After studying China and its cities, I am sure that I (4).... China in the future!