practice more and more
阅读理解是个综合能力，在好的语法基础上不能忽略听，说，读，写。要理解意思，而不是直译。I don't know what have you done normally, but watch movies, read some books and do some writing will help a lot. I understand it is easy for me to say, but don't give up and keep up with the good works.
答："Previously" 作为副词，在句中位置相当灵活。 previously on criminal mind 可看作：The outline of the ...详情>>
