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They use computers to keep the traffic ____ smoothly. A.being run B.run C. to run D.runni...

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accounts  bills  checks  records  
Large, but cheap, easy to use.  Large, expensive, very popular.  Small, cheap, easy to use.  Large, expensive, hard to us  
Large, but cheap, easy to use.  Large, expensive, very popular.  Small, cheap, easy to use.  Large, expensive, hard to use.  
application  usage  use  service  
an end  a close  a result  an outcome  
for entertainment and relaxation  to work out complex problems  to do any of the ten things mentioned in the reading  to keep track of expenses and turn appliances on and off  
Large, but cheap, easy to use.  Large, expensive, very popular.  Small, cheap, easy to use.  Large, expensive, hard to us  
larger and more expensive  smaller and cheaper  more hard to use  to work more slowly  
New use for computer  The popularity of home computer  The home computer Industry  Computers at home  
writing letters  playing games  doing business  all of the above  
work rapidly  be large and expensive  be easy to use  be used for fun  
soon  smoothly  Vividly  rapidly  
accounts  bills  checks  records  
application  usage  use  service  
application  usage  use  service  
exactly  really  surely  indeed  
for entertainment and relaxation  to work out complex problems  to do any of the ten things mentioned in the reading  to keep track of expenses and turn appliances on and off  
computers have been widely used by Americans  computers can solve complex problems  computers are domestic robots  computers are new machines  

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