题目内容：
Now the air pollution in this city ______ more and more serious with each passing day. A.to become
B.became
C.becoming
D.is becoming
参考答案：
选择题：Now the air pollution in this city ______ more and
- 题目分类：安阳师范学院-工商企业管理-大学英语
- 题目类型：选择题
- 查看权限：VIP
A.to become
B.became
C.becoming
D.is becoming