— do you spell the word “pen”?—P-E-N.A. HowB. WhatC. WhichD. Where

问题补充：

— do you spell the word “pen”?

—P-E-N.

A. How

B. What

C. Which

D. Where

答案：

(答案→)A. How

B. What

C. Which

D. Where

解析：回答语表示的是对单词拼写，对如何拼写提问的通常用how，故本题选A。