New York, being the largest city in the United States, was 19 the 212 area code, followed by Los Angeles at 213.
答案：(B) assigned
be assigned sth 意為「被分配到某物」，本句指紐約因為是美國最大城而被分配到 212 這組區碼；reserved（保留，須用 be reserved for）、represented（代表）、assembled（組裝、集合）語意都不合。
答對率 38%。
assign 你大概只記得「指派作業」，對象是工作；用在分配號碼、座位、房間上就陌生了。只要是「由上而下分派某樣東西給某人」都能用：be assigned a seat、be assigned an area code。
assign sb sth（分配某物給某人），改被動時人當主詞、物留在動詞後面：New York was assigned the 212 area code.被動後面還跟著一個名詞會覺得怪，其實那是原本的第二個受詞。give、offer、send、award 都一樣：He was given a prize.。
前一句說區碼是依人口規則分派的，本句接著說紐約分到 212、洛杉磯 213——有先後順序，正是「分配」。
reserved 要說 be reserved for；represented 是「代表」；assembled 是「組裝、集合」。
be assigned sth（被分配到某物）、be given／offered／awarded sth（被給予／提供／頒授某物）、be reserved for（為…保留）、an assignment（作業、任務）。
An area code is a section of a telephone number which generally represents the geographical area that the phone receiving the call is based in. It is the two or three digits just before the local number. If the number 16 is in the same area as the number making the call, an area code usually doesn't need to be dialed. The local number, 17 , must always be dialed in its entirety.
The area code was introduced in the United States in 1947. It was created 18 the format of XYX, with X being any number between 2-9 and Y being either 1 or 0. Cities and areas with higher populations would have a smaller first and third digit, and 1 as the center digit. New York, being the largest city in the United States, was 19 the 212 area code, followed by Los Angeles at 213.
In countries other than the United States and Canada, the area code generally determines the 20 of a call. Calls within an area code and often a small group of neighboring area codes are normally charged at a lower rate than outside the area code.