The government has declared its strong position ________ the prevention of river pollution．
A.considering
B.regarding
C.concerned
D.providing
网友回答
B解析句意：政府关于如何防止河流污染问题表明了坚定立场。considering．“鉴于”；regarding．“关于”；concerned改为concerning也可作介词用，意为“关于”；providing意为“假设……”，引导条件状语从句。