未知题型 听力原文： Mike Tyson's heavyweight fight with Clifford Etienne was postponed Monday, the former-champion saying that he had the flu and was not fit to fight. 'I'm sorry to let down all my fans in Memphis and around the world,' Tyson said in a statement. 'But I am not 100 percent and I do not want to perform. at less than that. I'm hopeful the fight can be rescheduled soon.' The postponement of Saturday's 10-round bout at the Pyramid Arena ended days of speculation about whether the fight would proceed and is sure to raise questions about the 36-year-old Tyson's boxing future. Fight promoter Showtime issued its own statement saying the TV network had no immediate plans to reschedule the bout, leaving a planned rematch with heavyweight champion Lennox Lewis also in doubt.Mike Tyson's heavyweight fight with Clifford Etienne was originally arranged to be on ______.A．MondayB．SaturdayC．SundayD．Tuesday

单项选择题 A．heavy B．advance C．common D．standard

未知题型 我国实行乡村兽医登记制度有利于（）。