这个问题花董第一天来美坛就问过了，我的回答“ 美语，就是美妙的英语”

Ｉpick up NCE4 as my learning materials as it has original reading. It is the main reason I would like to use NCE4.
 

I could improve my writing skills after I read every lesson many times. In addition to that, it is a famous learning material which could save me a lot of time in studying.    

One of shortcomings of NCE4 is that it has the British English rules and expressions and it is not updated, but it is not a big deal as nothing is perfect.

I like its depth and length of each lesson. 

I just  want to focus on what I would like to obtain from it.