The problem of air pollution is becoming
题型:选择题
问题:
The problem of air pollution is becoming more serious ______ the increasing number of cars.
A.as for
B.because
C.as a result
D.as a result of
The problem of air pollution is becoming more serious ______ the increasing number of cars.
A.as for
B.because
C.as a result
D.as a result of