Now the pollution caused by the increasing number of cars____ more and more serious in many cities.
举一反三
- Now the pollution caused by increasing number of cars ___________ more and more serious in many cities. A: ecome B: ecame C: is becoming D: had become
- Now the air pollution in this city ______ more and more serious with each passing day.
- Such problems（）air pollution and traffic jams becoming more and more serious in some big cities. A: like B: about C: as D: of
- Too many private cars _______ the serious pollution of the air.
- The increasing demand of cars has caused many problems.