单选题：Climatechangemakestheauthorfeelselfishwhenheismoreconcerneda

题目内容：

Climatechangemakestheauthorfeelselfishwhenheismoreconcernedaboutthepresentbirdsthanaboutfuturegenerations．

参考答案：

答案解析：

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According to the policy, how many vacation weeks would an employee who has worke

分类：英语四级题型：单选题