Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct word or phrase that best fits each of the numbered blanks from 19 to 24
One of (19) _______ important discoveries of the nineteenth century was a method of using natural gas for cooking and heating. Large amounts of natural gas are found in the United States, usually several thousand feet below the surface of (20) _______ Earth.
For many years after natural gas first discovered, it was thought to have no value. Finally, therefore, people began (21) _______ its uses and to find ways of storing it and of moving it from place to place.
Today natural gas is stored in large tanks and used for lighting, cooking, and heating. In (22) _______ ways, natural gas is one of our finest (23) _______. It is cheap and can be used for cooking without making the room hot. It can be moved (24) _______ from one place to another through long pipelines, some of which are hundreds of miles in length.
Question 19. A. more B. most C. as D. the most
Question 20. A. the B. ∅ C. a D. an
Question 21. A. to understand B. understand C. understood D. to understanding
Question 22. A. a lot B. much C. many D. any
Question 23. A. energies B. powers C. pollutants D. fuels
Question 24. A. easier B. easiness C. easy D. easily