### Chinese: 其次在选择之前打探一下这个培训机构，最好可以打探一下这个机构出来的学生，毕竟只有机构的学生才知道这个机构到底怎么样，讲解的课程是好或者不好。
### English: Secondly, you can ask something about the training institution before making selection; you'd better ask something from students of the training institution; after all, only students of the training institution can know it well and know the teaching quality.
### Errors: There is a major error at "can ask something". There is a major error at "making selection". There is a major error at "d better ask something from". There is a major error at "know it well". There is a major error at "teaching quality".

### Improved English: Secondly, you shall do some research on the agency before choosing it; it’s best to contact former students of the agency; after all, only students know how the agency really is and whether the curriculum is good or not.