问题描述: this is the second time she / improvement on that equipment; a:has made; 1个回答 分类:英语 2014-09-24 问题解答: 我来补答 答案为has made这是固定句型:this/it is the first/second/third...time+that-从句,意思是:第几次干某事.在从句中要求用现在完成时. 展开全文阅读