问题描述: Mary is writing a letter to her pen pal.(这个句子是就A LETTER 提问还是就 PEN PAL 提问 1个回答 分类:英语 2014-09-19 问题解答: 我来补答 如果就a letter提问,就是:What is Mary writing to her pen pal.后者是:Who is Mary writing a letter to? 展开全文阅读