Work in pairs.Match the words with their definitions.
1. How on earth. a) a valuable member of society with high ideals. 2. Heaven and earth. b) cost a lot of money. 3) Come down to earth. c) try everything possible to reach one's goal ( to achieve one's plan ). 4. The salt of the earth. d) It's used to express surprise, amazement. 5. Cost the earth. e) stop dreaming about plans and ideas that cannot be realized; return to reality.