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
4．Many people are worried about the pollution of ________(环境)．
答案：environment
5．He ____________ (抱怨) to the waiter that his meat was cold.
答案：complained
6．At the same time we are taking measures to ________(保护) wild resources.
答案：protect
