2. 外语
  3. The flashing red light served as a ______ of danger ahead.

The flashing red light served as a ______ of danger ahead.

admin2010-12-06  48
问题 The flashing red light served as a ______ of danger ahead.
选项 A、predictor
B、caution
C、precaution
D、prevention
答案B
解析 caution谨慎，警告；precaution预防措施或方法；predictor预测器，预报仪器；prevention预防，阻止，妨碍。
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