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56. ______ the girl felt sad and lonely.
A. There were many friends but
B. There was nobody to love her so
C. There was nothing to do
D. Seeing the butterfly was caught
57. Noticing the butterfly was caught by the thorn， the orphan girl ______.
A. helped the butterfly escaped from the thorn
B. felt sorrow，but she didn‘t go up to help it
C. fell down on it too
D. failed to help it release from the thorn
58. The butterfly ______ after was saved by the little girl.
A. flied away
B. still died
C. changed into a fairy
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