As a result these endangered animals may even die out.  die out
By the time he left the cave, the fire had _________. 在他离开山洞时候火就灭了。
The dinosaurs ________ millions of years ago. 恐龙在数百万年前就灭亡了。
灭亡、逐步消失、熄灭
died out
died out
die from 通常指因（外界原因影响）而死亡；die of 通常指因（疾病、情感、饥寒等）而死亡；die away 逐步减弱、逐步含糊、逐步消失。
  用以上含die短语填空。1) The fish in the lake has ________         because the water is seriously polluted.2) In big cities during cold winter months,         many old people ________ the polluted         air.
died out
die from