–The players in Super Brain can work out different problems in a very short time. –they ar

问题补充：

–The players in Super Brain can work out different problems in a very short time.

–they are! They have super brains indeed.

A. How interesting

B. How amazing

C. What interesting

D. What amazing

答案：

A. How interesting

(答案→)B. How amazing

C. What interesting

D. What amazing

解析：句意:-超级大脑的参赛者们可以在很短的时间内作出很难的问题。-他们真是太令人惊讶了。他们真的有超级大脑。本句考查感叹句，经常用到how 和what，他们的用法是what a/an 形容词+名词或what 形容词+名词；how 形容词+a/an+名词或how +形容词或副词。这里符合how 的第二个句型。根据句意可知选B。