A:6时和18时
B:8时和16时
C:5时和19时
D:4时和20时
-- It is reported that many wild animals in the world are _______ because of human behavior.
-- We must do something to stop people from hunting and selling these animals.
①古巴导弹危机
②美国发动朝鲜战争
③苏联出兵阿富汗
④马歇尔计划