单选题 An average of 82.4% of domestic travelers went on sightseeing tours during this year, an increase of 8.7% compared with the previous year.
【正确答案】 B
【答案解析】[解析] 全年国内居民出游率迭52.4%,比上一年增长了8.7%。an increase of指增长了的比例。