50 Which of the following words from the passage is closest in meaning to “advantage”？
(A)Credit.
(B)Standing.
(C)Edge.
(D)Potential.

(A)Credit. 榮譽，讚揚，功勞【美】學分；（某門功課的）及格記錄

(B)Standing. 身分；地位；名望

(C)Edge. 優勢；優越條件

(D)Potential. 潛在性,可能性,潛力,潛能,勢,位有潛力的,可能的,潛在的

這裡的advantage指的是"優勢"的意思，答案只能選edge。

後面這才是同一句（話說阿摩常有段落不清或標點脫落的現象）：

For more information on how to register and the benefits of scheduling AP courses, talk to your high school counselor, an AP instructor or go to http://www.CollegeBoard.com.想要得到更多資訊關於如何申請或是安排大學先修課程能帶來什麼好處，趕快去找你的學校的先修課程指導老師詢問，或是上我們的網站（下略）。

註：AP classes是美國大學委員會(College Board )為高中學生提供的進階先修課程 (Advanced Placement Program )。

Gain the edge in college preparation 增加大學準備的空間(edge做邊緣講在此表示有空間)

Stand out in the college admissions process 在大學錄取過程中脫穎而出

Broaden your intellectual horizons     擴大你的知識面

由開頭的文章即可得知:

 AP classes are college-level courses taken during high school that will provide students the opportunity to earn credit or advanced standing at most colleges and universities.

to earn credit or advanced standing

這兩個詞都是「修得學分」的意思 

Gain the edge in college preparation / Stand out in the college admissions process / Broaden your intellectual horizons For more information on how to register and the benefits of scheduling AP courses

請教中間都沒有逗點是為什？第三句擴大你的知識視界 for 後面怎麼翻呢希望高手指點一下～