March 11th was one of days in Japan,for the big earthquake happened.
A. sad
B. sadder
C. much sadder
D. the saddest
网友回答
A. sad
B. sadder
C. much sadder
(答案→)D. the saddest
解析：本句的含义为3月1号是日本最悲伤的日子，one of+形容词的最高级+名词的复数形式表示…其中之一，悲伤的最高级为the saddest，故本题选D。