Question

-         . hard Bill is working!-Yes. He's the most hard-working in our class.*

A．What

B．How

C．What a

D．How a

Answer 1

B

解析试题分析：句意：比尔的工作是多么努力！-是的。他是我们班上最勤奋的。英语中感叹句的构成：How+形容词+主语+谓语，What+a/an+形容词+可数名词单数+主语+谓语，What+形容词+不可数名词或可数名词复数+主语+谓语，所以选B。
考点：考查感叹句。