Do you remember that our ______speed is 60 mph on the highway an

Do you remember that our ______speed is 60 mph on the highway and Big Brother is watching you through his camera in some areas.
A、control
B、condition
C、permission
D、limit
【正确答案】：D
【题目解析】：control 控制； condition条件；permission许可；limit 限制；limit speed 限速，符合题意。