Question

24.( 2011 肇庆，26) You are too late.The film       since half an hour ago.

   A. has begun

   B. has been on

   C. began

Answer 1

24. B

24. B

句意:你来得太晚了。电影已经放了半小时了。本题考查动词 时态。由since可知此处要用现在完成时态，排除C项。从过去某个时间到现在一直在做某事，要用延续性动词，begin变为be on,故 选B项。