Here are the best choices to complete the passage:

1. **C. advantages** - "There are a lot of advantages of living in a city."
2. **B. unlike** - "The people who live in cities enjoy some special facilities and comforts unlike the village people."
3. **A. Moreover** - "Moreover, they can receive education in schools, colleges, and universities of high standard."
4. **B. cause** - "This smoke causes air pollution."
5. **C. harmful** - "Last but not least, city life is more or less artificial and monotonous. It has no touch with nature whatsoever."

So the completed passage reads:

"City life is full of advantages and disadvantages. There are a lot of **advantages** of living in a city. The people who live in cities enjoy some special facilities and comforts **unlike** the village people. Their houses are modern and the streets are well-lit. They can go shopping and buy everything they need. In case of sickness, they can avail the treatment of the best doctors. **Moreover**, they can receive education in schools, colleges, and universities of high standard. They can also visit libraries, parks, museums, and so on to stimulate their minds. However, city life has some drawbacks too. The city life is very fast. Everybody is rushing for a better life, a better luck, and a better opportunity. In city areas, people usually use vehicles run by fossil fuels which causes heavy smoke. This smoke **causes** air pollution. Thus, people living in urban life, the foul and smoky weather, and dirty atmosphere cause health **harmful**. Last but not least, city life is more or less artificial and monotonous. It has no touch with nature whatsoever."