The web is fantastic at many things, e-mail, e-commerce, for example. But _____ your name is Amazon Or Google, making money has proved hard.

A.if

B.although

C.unless

D.as

答案及解析： C

解析：

四个选项分别表示如果、尽管、除非和由于。根据题意，网络赚钱已经被证明是很难的，除非你的名字是亚马逊或者谷歌。故选C。