阅读理解。 Within a few years, girls in Europe have become heavier smokers than boys, for reasons that experts still don't understand, according to a British study presented (递交) last week to an international conference (大会) on smoking. Anti-smoking activists at the second 'Tobacco or Health' conference pointed out that although adults were giving up smoking in growing numbers, more and more young people were taking up the habit, particularly girls. One-fourth of the 15-year-old young people smoke regularly, according to the study made in 27 countries by Edinburgh University together with the World Health Organization. In Western Europe, girls were more likely to smoke than boys. In Germany or in England, one third of the girls were smokers compared to (相比) one in four boys. In Eastern Europe, the girls 'still fall behind' those in the Western Europe but were 'catching up' quickly, said the study. The study dealt with the behavior of 15-year-old in seven European countries between 1986 and 1998. The percentages (百分比) of young women smoking went from 17% to 36% in Austria, from 17% to 28% in Norway, from 21% to 28% in Hungary. In the seven countries and regions studied-Austria, Finland, Hungary, Norway, Sweden, Switzerland and Wales-more girls smoked than boys, with the exception (例外) of Hungary. 1. According to the article, more and more _____ in Europe were giving up smoking. [     ] A. adults B. boys C. girls D. old men 2. The number of boy smokers is _____ that of girl smokers. [     ] A. larger than B. as large as C. smaller than D. as small as 3. The study was made by _____. [     ] A. Edinburgh University B. the World Health Organization C. 'Tobacco or Health' conference D. Edinburgh University and the World Health Organization 4. The country where the number of young women smokers increases fastest is _____. [     ] A. Norway B. Austria C. Hungary D. Sweden 5. The main idea of the passage is to _____. [     ] A. introduce something about girl smokers in Europe B. report something interesting happened in England C. describe the present condition of European smokers D. warn young people around the world against smoking