注意：此页面搜索的是所有试题
题目内容
（河南农业大学-大学英语）
[单选题,9分] 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
A.to become
B.became
C.becoming
D.is becoming
参考答案
