单项选择题
A．believes he was fired illegally B．says he was not HIV positive C．understands why he had to be fired D．lives in San Francisco
A．traditional circus B．camp with blue and yellow tents C．modern circus with many acrobatic and gymnastic acts D．circus based in San Francisco
A．they haven't practiced enough B．the equipment is in need of repairs C．they perform risky acts without nets D．some are HIV positive