问题补充：
The Japanese suffering from the worst natural disasters .
A. are; ever since
B. are; of all time
C. is; ever since
D. is; of all time
答案：
A. are; ever since
(答案→)B. are; of all time
C. is; ever since
D. is; of all time
解析：第一空考查主谓一致The +形容词作主语谓语动词用复数形式；第二空考查短语of all time意为“有史以来”。 日本遭受了有史以来最严重的自然灾害。选B
