Mark the letter A, B, C, or D on your answer sheet to indicate the correct option that best fits each of the numbered blanks from 19 to 24.

Living in big cities can bring many benefits, but there are also serious challenges to face. One of the most pressing issues is pollution. The air is often filled with dust and smoke from factories and vehicles. ___(1)___, people are constantly exposed to noise pollution, which affects both their mental and physical health.
Another problem in cities is the lack of green spaces. Parks and gardens are essential ___(2)___ people can relax and breathe fresh air. However, as cities expand, these areas are ___(3)___ replaced by buildings and roads. This can make city life more stressful.
Despite these problems, many people still choose to live in cities because of the ___(4)___ of jobs, educational institutions, and healthcare services. Modern cities also offer many opportunities for entertainment and cultural activities, which can make life more enjoyable. If cities can find a way to manage pollution and preserve green spaces, ___(5)___ will be able to enjoy a high quality of life.
Finally, living in cities requires people to adapt to a fast-paced lifestyle. This can be challenging, but it also ___(6)___ individuals to develop useful skills, such as time management and problem-solving.