填空题 从供选择的答案中选出应填入下列英文语句中 1内的正确答案。
   Artificial Intelligence (1) a relatively young branch of science, new enough that we can still trace the development of the field from its inception in  1956 to the present. About six years ago, when we (2) planning the Handbook of Artificial Intelligence, we thought it would (3) possible to present AI comprehensively in three volumes. In retrospect, that seems to have (4) a good guess, although, inevitably, the outline (5) changed many times to reflect changes in the emphasis and methods of AL
   供选择的答案:
   (1)be    (2) am    (3) are    (4) is
   (5) was    (6) were    (7) being    (8) been
  • 1、
【正确答案】 1、was were be been was    
【答案解析】这道题主要是对时态的考查。A处应该是一般现在时,所以用is;B处应该用一般过去时,因为它前面的时间状语是大约6年前;B处应该用be,因为过去将来时的构成是would+动词原形;have后面应该用过去分词构成完成时,所以D处应该填been;E处用一般过去时,因为主语是the outline,所以填was。
   [参考译文]人工智能是一个相对年轻的科学分支,这个领域很新,其发展历史可以追溯到1956年。大约6年前,在计划编写《人工智能手册》时,我们认为可以用三卷来综合叙述人工智能。现在回想起来,这好像是一个好的猜想,尽管为了反映人工智能的重点和方法,其大纲不可避免地改变了许多次。