With nothing ________ to burn, the fire became weak and finally died out.
A:leaving
B:left
C:leave
D:to leave
图示岛屿南北端的直线距离约为(同一条经线上,纬度相差一度,距离相差110千米)( )
读长江主要污染物入海通量的变化图,回答下列各题。