Eighteen kids died in the school bus accident in Gansu Province. It’s one that I have ever heard of.
A. a very serious
B. a more serious
C. the most serious
D. the least serious
网友回答
A. a very serious
B. a more serious
(答案→)C. the most serious
D. the least serious
解析：本题难度适中，考查最高级，句子意思是，这个事故是我听到过最严重的，答案选C。