Eighteen kids died in the school bus accident in Gansu Province. It’s one that I have eve

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。