【单选题】【消耗次数:1】
Now Mike isn’t here. He _______ Mr. Green’s. Perhaps he _______back in a few minutes.
went to ; is coming
has gone to ; will come
has been to ; will be
is going to ; has come
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【单选题】 Now Mike isn’t here. He ________ Mr. Green’s. Perhaps he ________ back in a few minutes.
①  went to ; is coming
②  has gone to ; will come
③  has been to ; will be
④  is going to ; has come
【单选题】 10.Now Mike isn’t here. He _________ Mr. Green’s. Perhaps he _______ back in a few minutes.
①  went to; is coming
②  has gone to; will come
③  has been to ; will be
④  is going to; has come
【单选题】 There has been an atmosphere of ( ) around here for a few days now.
①  anticipation
②  greeting
③  knowledgw
④  knowing
【单选题】 He has been there, [填空]?
①  hasnt he
②  has he
③  does he
④  doesnt he
【单选题】 He used to in a small village, but now he has been used to in the big city.
①  live, living
②  live, live
③  living, living
④  living, live.
【单选题】 Mr. John was busy, ____ he could not come.
①  but
②  therefore
③  and
④  nor
【单选题】 Mr Longman has played the cello for many years [] but he now conducts an orchestra.
①  comma
②  semicolon
【判断题】 He has been in china for three years.
①  正确
②  错误
【单选题】 ____ was evident that Mr. Wang had come back to Shanghai.
①  This
②  He
③  That
④  It
【单选题】 Its ( ) that he has been away from home.
①  evident
②  important
③  genuine
④  alternative
随机题目
【单选题】 建立数据字典的时机是(  )。
①  需求分析阶段
②  据库物理设计阶段
③  数据库实施
④  概念结构设计阶段
【单选题】 下面关于数据库索引的说法,正确的是( )。
①  一个关系的聚集索引只能有一个
②  索引可以加快查询速度,所以越多越好
③  索引无需额外的存储空间
④  散列索引可以支持范围检索
【单选题】 视图建立后,在数据字典中存放的是( )。
①  查询语句
②  组成视图的表的内容
③  视图的定义
④  产生视图的表的定义
【单选题】 所谓概念模型,指的是( )。
①  客观存在的事物及其相互联系
②  将信息世界中的信息数据化
③  实体模型在计算机中的数据化表示
④  现实世界到机器世界的一个中间层次,即信息世界
【判断题】 索引可以加快查询速度,所以越多越好。
①  正确
②  错误
【判断题】 在一个关系表上最多只能建立一个聚簇索引。
①  正确
②  错误
【判断题】 数据库逻辑设计时,必须达到没有任何数据冗余的程度。
①  正确
②  错误
【判断题】 用E-R图赖描述信息结构但不涉及信息在计算机中的表示这是数据库设计的概念设计阶段
①  正确
②  错误
【单选题】 在整个设计过程中,最困难、最耗费时间的阶段是( )。
①  需求分析阶段
②  概念设计阶段
③  逻辑设计阶段
④  物理设计阶段
【单选题】 数据库逻辑设计时,下列原则中不正确的是( )。
①  一定要避免插入异常
②  一定要避免删除异常
③  尽量避免多表联接
④  一定要避免数据冗余