People were only shapes in dense, gray fog of dust and ash.
A、The dusty air made people barely visible.
B、The air was tod polluted for people to breathe.
C、People hardly stayed in shape in such dirty air.
D、People were almost buried in thick dust and ash.
【正确答案】：A
【题目解析】：译文：在灰蒙蒙、迷雾般的尘埃中，只能看到人们的身影。A项指“布满灰尘的空气让人几乎无法看清楚周围”；B项指“空气污染太严重了,使人无法呼吸"；C项指“人们几乎无法在如此肮脏的空气中保持健康”；D项指“人们几乎被灰蒙蒙,迷雾般的尘埃掩埋了”。可见，A项最符合题意。答案为A。
