A-A+
The flashing red light served as a ______ of d
问题详情
The flashing red light served as a ______ of danger ahead.
A．predictor
B．caution
C．precaution
D．prevention
参考答案
正确答案：B
解析：(caution告诫，警告)。句意为：闪亮的红灯所起的作用是就前面的危险发出警告。A．predictor预言者；C．precaution预防，警惕；D．prevention预防，防止。
