单选题 Just last week, for example, the World Heahh Organization (WHO) announced the disturbing disclosure that chick flu may be pretty deadlier than previously believed.
【正确答案】 B
【答案解析】[解析] 本题考查副词应用。pretty在这里为副词,意为“相当”,修饰形容词比较级deadlier;用来修饰比较级的副词有far,much等,而very,especially只能修饰形容词原级。所以,答案是B。