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No two friendships are ever exactly alike. But all true friendships have three things in common. If you plan to keep your friends, you must practice honesty, generosity and understanding.
51. Some friendships don’t last very long because _____.
A. there are too many people who want to make friends
B. some people receive friendship but don’t give friendship back
C. those who give others friendship receive friendship from others
D. they don’t know friendship is something serious
52. According to the passage honesty is ______.
A. something countable B. the base of friendship
C. as important as money D. more important than anything else
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