Question

You are too late. The film ______ since half an hour ago.
A. has begun              B. has been on        C. began    

Answer 1

B

根据时间状语从半小时前，可知本句为完成时态。begin可以用于完成时，但是它是一个短暂性动词，后面不能跟一段时间。所以选B。