问题补充:
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
答案:
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。