The key answer of exercise 2

a)

imposing = impressive to look at

b)

• breathtaking: positive - very impressive or exciting; to describe, e.g. a view, an experience
• iconic: positive - acting as a classic symbol of sth; to describe, e.g. a building, a painting
• run-down: negative - in very bad condition; to describe, e.g. a building, an area in a city
• soulless: negative - depressing; to describe, e.g. a city, a building, a monument
• tacky: negative - cheap and lacking in taste; to describe, e.g. souvenirs, a hotel or restaurant