For many cities in the world there is no room to spread out farther New York is an exam

问题补充：

For many cities in the world, there is no room to spread out farther, New York is an example.

A. for which

B. in which

C. of which

D. from which

答案：

A. for which

B. in which

(答案→)C. of which

D. from which

解析：句意：对于世界上的很多城市，没有空间继续发展了。纽约就是其中的一个例子。本题使用了定语从句，先行词是many cities，which指代先行词在句中作为of的宾语。Of表示所属关系，of which放在an example的后面。故C正确。