Mark the letter A, B, c, or D to indicate the correct answer to each of the following questions. TỚ CẦN GIẢI CHI TIẾT Ạ 18. Urban ______ is prevalent in most cities. Everywhere you go there are building sites, pedestrian precincts, blocks of flats, and housing estates spreading into the countryside. A. Sprawl B. expansion C. widening D. spread 19. This safe, _____ friendly city is like a paradise for its inhabitants who can enjoy the highest quality of life. A. Environment B. Environmental C. Environmentally D. environmentalist 20. _____ waste is putting city dweller’s health at a real risk. A. Treatment B. Untreated C. Non-treatment D. Non-treated 21. Every month, scientists invent new gadgets and _______ to help us with our daily lives, and discover ways to make existing technology faster and better. A. Experiments B. effects C. laboratories D. equipment 22. Unlike the country where the day often ends quite early in the evening, the city offers its people exciting_________ . A. Activities B. performances C. nightlife D. night clubs 23. The roads are terrible. I’m always getting __________ in traffic. A. Stuck B. lost C. exhausted D. late