单项选择题
A. it tells drivers not to go fast B. it will distract the driver's attention C. it is too difficult to understand D. it is too long to be read quickly
A．When he has been injured by somebody. B．When his car has been damaged. C．When he has injured somebody else. D．When he has witnessed the accident.
A. without doubt B. in no way C. probably not D. surely not