The key answer of exercise 8

Content words

• conservation, institute, United States, produced, wild kittens, cross-breeding cloned adult cats
• American millionaire, succeeded, long-held ambition, circumnavigate, world, balloon
• finally, story, man, entered, record books, world's most renowned eater, burgers

Function words

• A, in the, has, by
• An, has, in his, to, the, in a
• And, the, of a, who has, the, as the, of