As the quality of the city’s air continu
题型:选择题
问题:
As the quality of the city’s air continues to give rise to ________, the residents are encouraged to drive cars less often.
A.descriptions
B.compromise
C.concerns
D.emergency
As the quality of the city’s air continues to give rise to ________, the residents are encouraged to drive cars less often.
A.descriptions
B.compromise
C.concerns
D.emergency