单项选择题

According to the third paragraph, improper calls on the football field ______.

A．are evidence of corruption by some officials
B．are increased by the higher speed of the game
C．result from reduced proficiency of referees
D．are caused by anything other than human error

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单项选择题

We can learn from the first paragraph about Juventus that ______.

A．it was criticized of unfair practice in competition
B．it might be disqualified from the World Cup
C．its members were involved in gambling activities
D．it paid money to referees assigned for its matches

单项选择题

What do referees think of a balls-and-strikes calling machine in baseball games

A．They doubt on its accuracy in judging games.
B．They think it unnecessary to use such machine.
C．They don't care whether the machine is in use or not.
D．They find it helpful to make more satisfactory calls.