问题补充:
At the end of the year , some species of birds ddn’t survive the winter in some European countries.
A. severe
B. serious
C. mild
D. extreme
答案:
(答案→)A. severe
B. serious
C. mild
D. extreme
解析:词义辨析。severe严峻的,严酷的;serious严重的,严肃的;mild温和的;extreme极端的,过激的。句意:在底,在一些欧洲国家,一些鸟类没有渡过严峻的冬季。所以选A。