while, for, because有什么区别

______ the vastness of the Grand Canyon, it is difficult to capture it in a single photograph.

A.Whilee
B.Because of
C.For

______ the vastness of the Grand Canyon, it is difficult to capture it in a single photograph.

A.Whilee
B.Because of
C.For

逗号之前是名词性结构，应该选择介词构成介词短语作状语。结合主谓结构的内容，应该是缘由状语，故选择B项，Because of.

A项while是连词，后接从句。C项for一般表示目的，不表示缘由。