【单选题】He doesn't know the city very well, because this is the first time he _____ here. [ ]
【单选题】_____ he came, he would bring us a lot of flowers.
【单选题】查看命令sort的帮助文件,可以使用命令( )。
【判断题】生物学教学是一个多要素、多层次、多序列的复合、开放、动态的系统工程。
【单选题】下列哪种游览方式不是日本庭院的游览方式( )
【简答题】A. supper B. suppose C. surround D. support
【单选题】He started to work dilligently _____ he came up with the idea of hybrid rice for the first time in the 1960’s.
【单选题】_______ the manager came to Beijing on business, he would visit his old friends there. [ ]