A：怨怅吹墟劈头劈脑对答如流
B：羡幕寻思自暴自弃地灵人杰
C：伶利朦胧忙忙碌碌挖心搜胆
D：褒贬班师犹豫不决有感于怀
-You look so worried, what’s wrong?
-More and more people like me begin to worry about the ______ pollution after the haze (雾霾) appeared in Beijing and some other cities in China.
