private cars are bringing us convenience, they may also cause more traffic accidents and

发布时间：2020-08-14 23:22:56

     private cars are bringing us convenience, they may also cause more traffic accidents and pollution.
A. While
B. As
C. If
D. Since

网友回答

(答案→)A. While
B. As
C. If
D. Since
解析：while表示对比，意思接近whereas“当……却……”。
以上问题属网友观点，不代表本站立场，仅供参考！