There's a rising problem with the popula
题型:选择题
问题:
There's a rising problem with the popularity of private cars _____ road conditions need _____. [ ]
A. that; to be improved
B. which; to improve
C. where; improving
D. when; improving
There's a rising problem with the popularity of private cars _____ road conditions need _____. [ ]
A. that; to be improved
B. which; to improve
C. where; improving
D. when; improving