问题
选择题
It is required that all traffic participants should _____ the traffic rules to make traffic safer and faster.[ ]
A. perform
B. observe
C. support
D. possess
答案
答案：B
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It is required that all traffic participants should _____ the traffic rules to make traffic safer and faster.[ ]
A. perform
B. observe
C. support
D. possess
答案：B