我选择了以前的课程使用的书。
I chose the book that had been used in previous offerings of the course.
以前的课程怎么都没了我还没学完呢，还能在哪找到呀！
Sorry I can not find the former lessons entry. Please give me help.
以前的学生们对该课程的内容和教师只有称赞。
Previous students have had nothing but praise for the course content and staff.
这门课程比每个人以前预料的还要难得多。
This subject is far more difficult than everybody has previously expected.
这门课程比每个人以前预料的还要难得多。
This subject is far more difficult than everybody has previously expected.
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