问题描述:
这两个句子为什么要用过去完成时?
Soon after he volunteered for military service,he had received a book from this woman.
For thirteen months,she had faithfully written to him.
Soon after he volunteered for military service,he had received a book from this woman.
For thirteen months,she had faithfully written to him.
问题解答:
我来补答展开全文阅读