某记者抽样调查了某校一些学生假期用于读书的时间（单位：分钟）后，绘制了频数分布直方图，从左到右的前5个长方形相对应的频率之和为0.9，最后一组的频数是15，则此次抽样调查的人数为 ____ ．（注：横轴上每组数据包含最小值不包含最大值）

①加强诚信建设，增强居民消费预期

②引导居民量入为出，避免盲从消费

③提升产品质量，满足新的消费需求

④培育知名品牌，提高商品供给水平

综合填空
   Jim is a schoolboy. He is 13 years old .He's in Class 3,Grade 1. He always____ (get ) up early and he often____(go) to school by bike . He ____ (like) English,Chinese maths and some other lessons. He enjoys singing and____ (dance) .But now he ____ (have) an English class . Look. Some of the students____  (read) books and some of the students____ (write) the new works. They are working hard .But tomorrow is Saturday. They won't have any lessons .He and his classmates ____ (play) football tomorrow moring. They ____ (check) emails tomorrw afternoon.  They  ____ (watch) TV tomorrow evening .I think they’ll have a good time .