第二，我平时上课时都专心听讲的的缘故。
Second, I usually have to concentrate in class listening to reason.
控制组按平时上课内容正常进行，没有附加练习。
According to the control group at ordinary times normal class content, no additional exercises.
另外，他们有比平时上课更多用英语交流的机会，而且比起他们课本上学到的表达方式更加纯正。
Also, they're getting conversational English they wouldn't get in a normal class, more authentic English, with phrases they wouldn't get in textbooks.
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