问题描述： that does 1个回答 分类：英语 2014-10-16 问题解答： 我来补答 你好!看上下文联系啦.比如,can i donate my blood to help those injuried children in Si Chuan?yes, that does it!（我可以鲜血来救助四川的受伤的孩子们吗? 当然,那当然管用了）这里的that does it就是管用,有效的意思.谢谢! 展开全文阅读
