文件名称：英语博士试题用考北京大学
文件大小：48KB
文件格式：DOC
更新时间：2014-01-02 05:14:03
英语博士试题
用于考博士的部分试题 21．_________ before we leave the day after tomorrow, we should have a wonderful time together. [A] Had they arrived [B] Would they arrive [C] Were they arriving [D] Were they to arrive