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“We must get him away from here，” the fireman said， “It‘s too dangerous.” He tried to push Tim to one side.
“Nobody‘s moving him.” Tom said， and shook off the fireman’s hand. “Nobody‘s moving him until a doctor comes.”
51. Tim stopped his car because ___________.
A. it was on fire
B. there was something wrong with his car
C. he wanted to help Dave
D. he wanted to get to the fire first
52. Time found Dave______________.
A. on the grass near the car
B. in the front of the car
C. under the car
D. dead
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