互动封闭仿真课堂
1、智能交互 2、电子板书式视频教学 3、在线互动问答 4、封闭课堂启发式教学方式
随堂测试、知识梳理、易错点揭示、总结启迪智能错题本
听课中的错题能自动加入错题本，课后可方便复习及导出错题本升级服务
在线答疑、课后同类题练习、讲义下载、短信提醒The newspaperman did not understand what Johnson meant. In his newspaper he reported that Johnson was seventy-five and had a daily injection in his neck. Within a week Johnson received thousands of letters from all over Britain， asking him for the secret of his daily injection.
51. Johnson became a rich man through _________.
A. doing business.
B. making whisky.
C. cheating.
D. buying and selling land.
52. The gift of money to the school suggests that Johnson __________.
A. had no children.
B. was a strange man.
C. was very fond of children.
D. wanted people to know how rich he was.
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