题目内容：

_____the terrible pollution,so many beautiful fishes are fast disapearing in the river.
A.According to B.Because of C.Because D.As a result

优质解答

according to 根据
because of +名词短语/代词 由于,因为
because + 句子 由于,因为
as a result,结果
根据句意：由于严重的污染,如此多的美丽鱼在河里正快速消失.
排除A D
the terrible pollution是名词短语,
所以,答案：B