— hard Tony is working!—Yes. We should learn from him.A. WhatB. HowC. What aD. How a

问题补充：

— hard Tony is working!

—Yes. We should learn from him.

A. What

B. How

C. What a

D. How a

答案：

A. What

(答案→)B. How

C. What a

D. How a

解析：考查感叹句的用法。中心词为副词hard，故填 how。句意“托尼工作多努力啊！”