... The firemen were unable to determine exactly what caused the fire, when they said that they would A B C Dcontinue the investigation.122. Because of its strong record during earlier recessions, ... and give us names seems to be as old as the human race. A B C D535. Each day 16,000 people contract HIV, nearly doubled the previous estimate of the infection rate. A B C D536. In the last ... date such inorganic materials as potty shards or rock and A B Cmetal artifacts, often the only traces of early man. D541. He confessed that for months he was scarcely being able to look at...