NAM IS _______THAN HOA. A. WELL B. GOOD C. BETTER D. THE BEST (17...

16. Nam is _______than Hoa. A. well B. good C. better D. the best (17 – 24) Choose the word or phrase (A, B, C, D) that best fits the blank space in the following passage:(4 pts) About twenty percent of the world’s present (17) _______ comes from the sun in one from or another. Special devices have already (18) _______made available to put on the roofs of houses and flats to (19) _______the sun’s rays and thus heat water .Thousands (20) _______ these devices are now being used to provide energy in homes throughout the United stats while (21) _______ than a million solar water- heating units have already been built in homes in Japan. Other purposes for which (22) _______ energy is at present being used, including the removal of salt from seawater, irrigation and sewage disposal. For most people (23) _______ developing countries, the need is not for air- conditioners or central heating but for cheap (24) _______ of cooking food, drying crops and lighting homes.