题目内容：
4. The underlined words a zebra crossing probably mean ________.A. a safe place across a road for pedestrians to walk across the road
B. a wild animal from Africa that looks like a horse with broad dark brown and white stripes on its body
C. a safe place across a road for zebras to walk across the road
D. a safe place across a road for children to play a game
参考答案：