Question 18: Choose the word or phrase among A, B, C or D that best fits the blank space in the following passage:
"Do you want to take part in the battle to save the world’s wildlife? “Animal Watch” is a book which will (1)….. you in the fight for survival that (2)…. many of our endangered animals and show how they struggle on the (3)…. of extinction. As you enjoy the book’s 250 pages and over 150 colored photographs, you will have the (4)….. of knowing that part of your purchase money is being used to help animals (5)…. . From the comfort of your armchair, you will be able to observe the world’s animals close-up and explore their habitats. You will also discover the terrible results of human greed for land, flesh and skins. “Animal Watch” is packed with fascinating facts. Did you know that polar bears cover their black noses (6)…. their paws so they can hunt their prey in the snow without being seen, for example? Or that for each orangutan which is captured, one has to die? This superb (7)…. has so (8)….. Britain’s leading wildlife charity that it has been chosen as Book of the Year, a (9)….. awarded to books which are considered to have made a major contribution to wildlife conservation. You will find “Animal Watch” at a special low introductory at all good bookshops, but hurry while (10)….. last."
3. show how they struggle on the (3)…. of extinction.
A. shore, edge
Translation: shows how they struggle on the verge of extinction.