Decide which of the words given below would best complete the passage if inserted in the corresponding blanks. The words can be used ONCE ONLY. A. as B. aimless C. bother D. fast E. flights F. helpless G. labor-saving H. levels I. money-saving J. pause K. quite L. stand by M. standstill N. traffic O. trapped Electricity is such a part of our everyday lives and so much taken for granted nowadays that we rarely think twice when we switch on the light or turn on the TV set. At night, roads are brightly lit, enabling people and (1) _________ to move freely. Neon lighting used in advertising has become part of the character of every modern city. In the home, many (2) _________ devices are powered by electricity. Even when we turn off the bedside lamp and are (3) _________ asleep, electricity is working for us, driving our refrigerators, heating our water, or keeping our rooms air-conditioned. Every day, trains, buses and subways take us to and from work. We rarely (4) _________to consider why or how they run-until something goes wrong. In the summer of 1959, something did go wrong with the power-plant that provided New York with electricity. For a great many hours, life came almost to a (5) ________. Trains refused to move and the people in them sat in the dark, powerless to do anything; lifts stopped working, so that even if you were lucky enough not to be (6) _________ between two floors, you had the unpleasant task of finding your way down (7) _________ of stairs. Famous streets like Broadway and Fifth Avenue in an instant became as gloomy and uninviting (8) _________ the most remote back streets. People were afraid to leave their houses, for although the police had been ordered to (9) _________ in case of emergency, they were just as confused and (10) _________ as anybody else.