单项选择题

Directions: There are 10 questions in this part of the test. Read the passage through. Then, go back and choose one suitable word or phrase marked A, B, C, or D for each blank in the passage. Mark the corresponding letter of the word or phrase you have chosen with a single bar across the square brackets on your machine-scored Answer Sheet.
There are two primary causes of traffic accidents, those that are caused by the driver and those that are environmental and outside the driver’s control. 1 environmental issues like weather or poor road maintenance may cause an accident, statistically these are far less likely to do so. Driver distractions prove to be the main cause of accidents. The most 2 distractions are looking at traffic, crashes and roadside incidents. While it is widely believed that cell phones are a greater cause, cell phones only 3 sixth on the list. 4 , laws to limit cell phone use while driving do not decrease accidents. Hands-free phones are 5 than hand-held devices.
Alcohol was a factor in at least 41 percent of all fatal crashes. Alcohol 6 affects vision, reaction time and attention of the driver, and decreases overall driving performance. Fatigue 7 100,000 vehicle crashes per year, killing 8 1,500 people and injuring 71,000 people. Accidents caused by fatigue are particularly 9 for truck drivers and others taking long-haul driving trips. Speeding is another major cause of traffic accidents, particularly for younger or newer drivers. Teens are more likely to speed, and among male drivers aged 15 to 20 who were 10 a fatal crash in 2005, 37 percent were speeding at the time of the crash.