题目内容：
________ the city.s environment(环境) has become of great importance.A.The improving
B.Improving of
C.Improving
D.Being improved
参考答案：
选择题：________ the city.s environment(环境) has become of
- 题目分类：河南财经政法大学-会计-大学英语1
- 题目类型：选择题
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A.The improving
B.Improving of
C.Improving
D.Being improved