When we talk about the climate（气候）of the UK, you may think of f   1   London and rainy weather. Actually, after many years, London is not as foggy as it used to be because the government is trying their best to solve the p  2   of air pollution, which is the major(主要的) r   3  of the thick fog in London.
However, it is t  4   that it often rains in the UK and the weather always changes quickly. Maybe you wish to play tennis with your friend after work when you see the beautiful sunshine in the morning, but suddenly the wind comes and it r  5  when you go to work.
The difference in temperature b  6  winter and s   7   is not so great in the UK as in China. The average（平均的）t  8   for winter is about 4.5℃, and for summer about 15.5℃.
And the best time to visit the country is in summer. It is often s   9  and you can enjoy outdoor sports and have a picnic h 10   in such weather.

When we talk about the climate（气候）of the UK, you may think of f   1   London and rainy weather. Actually, after many years, London is not as foggy as it used to be because the government is trying their best to solve the p  2   of air pollution, which is the major(主要的) r   3  of the thick fog in London.

However, it is t  4   that it often rains in the UK and the weather always changes quickly. Maybe you wish to play tennis with your friend after work when you see the beautiful sunshine in the morning, but suddenly the wind comes and it r  5  when you go to work.

The difference in temperature b  6  winter and s   7   is not so great in the UK as in China. The average（平均的）t  8   for winter is about 4.5℃, and for summer about 15.5℃.

And the best time to visit the country is in summer. It is often s   9  and you can enjoy outdoor sports and have a picnic h 10   in such weather.

A recent study offers a picture of how dangerous it is to get a lift from a teenage driver. Indeed, a 16-year-old driver with three or more passengers is three times as likely to have a fatal（致命的）accident as a teenager driving alone. However, the possibility of death for drivers between 30 and 59 decreases with each additional (added) passenger.

　　It was also found that the death rates for teenage drivers increased greatly after 10 p.m., and especially after midnight. With passengers in the car, the driver was even more likely to die in a late night accident.

　　Robert Foss, a scientist at the University of North Carolina Highway Safety Research Center, says the higher death rates for teenage drivers have less to do with “really stupid behavior” than with just a lack of driving experience. Both he and the author of the study believe that the way to help solve the problem is to have states setting up so-called graduated licensing systems（等级执照制）. A graduated license requires that a teenager first prove that he/she is able to drive in the presence of an adult, followed by a period of driving with a limited number of passengers, before graduating to full driving on his own. About half of the states now have some sort of graduated licensing system in place. The systems have reduced teenage driver crashes（相撞）, according to recent studies.

1.Which of the following situations is most dangerous according to the passage?

A．Adults giving a lift to teenagers on the highway after 10 p.m.

B．A teenager driving after midnight with passengers in the car.

C．Adults driving with three or more teenage passengers late at night.

D．A teenager getting a lift from a stranger on the highway at midnight.

2.According to Robert Foss, the high death rate of teenage drivers is mainly because __.

A．their preference for driving at night

B．their lack of driving experience

C．their careless way of driving

D．their driving with passengers