1dieout:Toceaselivingcompletely;becomeextinct:tribesandtribalcustomsthatdiedoutcenturiesago.
看词义可知,dieout指完全不再生存下去-就是“灭绝”的意思:“部落及其习俗在数百年前就消亡了.”
2.dieoff:
Toundergoasudden,sharpdeclineinpopulation:Rabbitsweredyingoffinthatcounty.
看词义可知,dieoff是指人口数量骤然下降:“那国的兔子正在减少.”
3.diedown:
Tolosestrength;subside:Thewindsdieddown.
看词义可知,diedown是力量的削减:“风力减弱了.”
4.dieaway:
becomelessinamountorintensity;"Thestormabated".
看词义可知,dieaway是数量和强度的减少:“风暴减弱了”和3类似.
所以应该选A.我教你个记忆的方法,dieout表“灭绝”,dieoff表“正在灭绝”,虽然这个不是很准确,但你这样记忆做题就没问题了.