题目

根据句意及首字母提示完成单词。 (1) Drinking is a principal c of traffic accidents. (2) She had spent all her life working in the (工厂). (3) I feel it is our duty not to p our environment. (4) Cats and mice have always been natural .(敌人) (5) My father works in the (石油) industry. 答案: 【1】cause 【1】factory 【1】pollute 【1】enemies 【1】oil
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