问题
选择题
You are too late. The film ______ since half an hour ago.
A. has begun B. has been on C. began
答案
答案：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。
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You are too late. The film ______ since half an hour ago.
A. has begun B. has been on C. began
答案：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。