题目

Soon it would be the holidays, but before that, there were final  1  . All the kids had been working hard for some time, reviewing their  2  . If they didn’t pass the exams, they would have to  3  them in September. There were usually a few who  4  , but Jane didn’t want to be one of them. She had worked hard all year, but she was working so hard that her mother  5 her. She went to bed too late. The night before the big day, her mother  6  that she should have an early night and take a sleeping pill. She promised to  7  her up in the morning.        Jane was to  8  to 九亿八千零一万三千零二十写作______，改写成用万作单位的数是______万，四舍五入到亿位写作______．