____ it comes to traffic rules, I often
题型：选择题
问题：
____ it comes to traffic rules, I often come across such cases _____ the local drivers obviously know
them but won't follow them. [ ]
A. If; why
B. As; which
C. Once; as
D. When; where
____ it comes to traffic rules, I often come across such cases _____ the local drivers obviously know
them but won't follow them. [ ]
A. If; why
B. As; which
C. Once; as
D. When; where