问题
选择题
Fog and Haze occurred in many areas of our country , a large area of low visibility condition in the city.
A causing B cause C to cause D caused
答案
答案：A
题目分析：句意：我们国家大部分地区出现了雾霾天气，导致城市的能见度很低。这里causing a large area of low visibility condition in the city作结果状语。