填空题

Questions 24-27
Answer the following questions using NO MORE THAN THREE WORDS AND/OR A NUMBER for each.

填空题 What proportion of cell-phone users use their phones regularly while driving?

填空题 When are drivers at greatest risk from drowsiness?

填空题 When are over half of fatal accidents alcohol-related?

填空题 What is the term for a person who doesn't drink so that they can drive?