Definition: to warn someone of a dangerous situation Level: C2
当孩子没有按时回家时，父母发出了警报。
The parents ___raise ___the ___alarm when their child doesn't return on time.
卫生官员迅速对这种新疾病发出了警告。
Health officials quickly ___raise ___the ___alarm about the new disease.
环保组织正试图就气候变化发出警告。
Environmental groups are trying to ___raise ___the ___alarm about climate change.
