人在青春期的最大变化是____器官的发育和成熟。男孩出现____，女孩出现____。青春期的人体变化，还表现在____器官功能的日渐健全，如____收缩力增强、肺____量增大、脑____功能增强等。

一凡文具店每天上午8时开始营业，下午7时停止营业，每天营业____时。

    Tom always can't sleep well at night. But he was never late for work. He went to see his doctor on Sunday afternoon. He took the subway to get there. He met his boss on the subway and they talked for a while.

    Tom got some sleeping pills from the doctor. That night Tom took the pills. He had a nice sleep. He went to work happily on foot in the morning. Getting into the office, he said to his boss “I had a nice sleep and got up happily this morning.” “That's fine,” shouted the boss, “but where were you on Monday?”

电视剧《乔家大院》 展现了一代晋商乔致庸的传奇一生。晋商等商帮活跃的时期是