问题
This is a new problem _____in the popularity of private cars _____road conditions need to be improved [ ]
A: involving, that
B: involved, that
C: involved, where
D: involving, which
B: involved, that
C: involved, where
D: involving, which
正确答案是：
同类题型
ed to catch early train, butcouldn’t get ride to the station.
It’s raining heavily now. You’d better_______home.
Why not stop __________ a rest— Oh, it’s so exciting that I can’t stop ____________ the model plane.
The two pens are the same, but the red one cost _____________ that one.
I’m still working on my project.-Oh,you’ll miss the deadline.Time is . [ ]