A) slightly above average
B) higher than in the 1998 World Cup
C) quite unexpected
D) as high as in a standard match
23.The findings of the experiment show that ________.
A) errors are more likely when a referee keeps close to the ball
B) the farther the referee is from the incident, the fewer the errors
C) the more slowly the referee runs, the more likely will errors occur
D) errors are less likely when a referee stays in one spot
24.The word “officials”(Line 2, Para. 4)most probably refers to ________.
A) the researchers involved in the experiment
B) the inspectors of the football tournament
C) the referees of the football tournament
D) the observers at the site of the experiment
25.What is one of the possible conclusions of the experiment?
A) The ideal retirement age for an experienced football referee is 45.
B) Age should not be the chief consideration in choosing a football referee.
C) A football referee should be as young and energetic as possible.
D) An experienced football referee can do well even when in poor physical condition.
答案：21.B 22.C 23.A 24.C 25.B