单选题Now the pollution caused by the increasing number of cars _____ more and more serious in many cities.AbecomeBbecameCis becomingDhad become
单选题
Now the pollution caused by the increasing number of cars _____ more and more serious in many cities.
A
become
B
became
C
is becoming
D
had become
参考解析
解析：
本题考查现在进行时。句意：现在，车辆增加所造成的污染在很多城市变得越来越严重。由本句开头的“now”可知，本句应用现在时。故C项为正确答案。
本题考查现在进行时。句意：现在，车辆增加所造成的污染在很多城市变得越来越严重。由本句开头的“now”可知，本句应用现在时。故C项为正确答案。
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