【单选题】【消耗次数:1】
I haven’t finished my composition . I________ for two hours and a half.
have written it
have been writing it
wrote it
am writing it
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相关题目
【单选题】 I haven’t finished my composition . I ________ for two hours and a half.
①  have written it
②  have been writing it
③  wrote it
④  am writing it
【单选题】 I haven’t finished my composition. I ___ for two hours and a half.
①  ?have written it
②  ?have been writing it
③  ?wrote it
④  am writing it
【单选题】 I often ______ the cooking for my family, but recently I have been too busy to do it.
①  will do
②  do
③  am doing
④  had done
【单选题】 I have been looking forward to ____ from my parents.
①  :hear
②  :being heard
③  :be heard
④  :hearing
【单选题】 ( ) he finished writing the composition in such a short time surprised us all.
①  What
②  How
③  That
④  If
【单选题】 I am ____ grateful for the many kindnesses you have shown my son.
①  excessively
②  much
③  certainly
④  exceedingly
【判断题】 I have finished the book.
①  正确
②  错误
【单选题】 I have_______ finished the homework.
①  yet
②  already
③  still
【单选题】 The reason _________ I am writing this letter is to tell you about the meeting on Saturday.
①  because
②  why
③  for
④  as
【单选题】 I haven’t read ____ of his books, but judging from the one I have read I think he’s a very promising writer.
①  any
②  none
③  both
④  either
随机题目
【单选题】 浆体在凝结硬化过程中,其体积发生微小膨胀的是( )作用。
①  石灰  
②  石膏  
③  普通水泥  
④  黏土
【单选题】 在凝结硬化过程中收缩最大的是( )。
①  白水泥
②  石膏
③  石灰
④  粉煤灰水泥
【判断题】 硅酸盐水泥不宜用于受流动的水和有水压作用的工程,不宜用于受海水和矿物水作用的工程,也不宜用于大体积混凝土工程( )。
①  正确
②  错误
【判断题】 在水泥中,石膏加入的量越多越好( )。
①  正确
②  错误
【判断题】 大理石宜用于室外装饰( )。
①  正确
②  错误
【判断题】 因水泥是散粒材料, 测定水泥的密度可用排水法( )。
①  正确
②  错误
【判断题】 硅酸盐水泥3天龄期的强度比同强度等级的矿渣水泥3天龄期的强度高( )。
①  正确
②  错误
【单选题】 学院篮球场混凝土宜选用( )。
①  普通水泥
②  粉煤灰水泥
③  矿渣水泥
④  火山灰水泥
【单选题】 石灰熟化过程中的陈伏是为了( )。
①  充分熟化 
②  增加产浆量 
③  减少收缩  
④  降低发热量
【单选题】 建筑石膏硬化后强度不高,其原因是(  )。
①  CaSO4强度低
②  β晶型强度低
③  结构中孔隙率大
④  杂质含量高