ⅰ.根据汉语提示写出单词 1．nowadays people use too many________(化学药品)in their life，which is bad for the living conditions. 2．they've made an________( 紧急的)request for international aid. 3．we should pay more attention to the pollution of the________(大气)． 4．many people are worried about the pollution of________(环境)．
