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.
答案：chemicals
2．They've made an ________ (紧急的) request for international aid.
答案：urgent
3．We should pay more attention to the pollution of the ________ (大气)．
答案：atmosphere
