When he_ _to the cinema,the film __for half an hour.

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When he_ _____to the cinema,the film ______for half an hour.[ ]
A.got; had begun
B.got; had been on
C.had got; was on
D.had got; had been on

B.
整个句子意思是“当他到达电影院的时候,电影已经放映了半个小时.”（顺便说一下,前半部分是when引导的时间状语从句,后面是主句.）
这个句子描述了发生在过去的事情,肯定是用过去时态.再比较两个事件的发生时间,显然got to 是发生在be on半个小时之后的事了,那么,为了表达电影是在“他到达电影院”之前发生的事,就应该用过去完成时来表示,所以用had been on.
for half an hour表示一段时间“半个小时”；而begin虽然有过去分词begun,但是它不能跟一段时间连用,它是在一个时间点上“发生、开始”,不能说“开始了半个小时”,逻辑不通.
再问： had been on什么意思？？？回答完就采纳！

When he_ _____to the cinema,the film ______for half an hour. By the time we got to the cinema the film（）for half an hour When he got the cinema,the film （ )for helf an hour. 英语改病句 The film has begun for half an hour when I got to the 1.The film began half an hour ago. The film began half an hour ago.(改为同义句） The film ____ ____ _ The film was on half an hour ago.同义句.The film ____ ____ ____ 1.The film began half an hour ago.(同义句) The film ----- ----- When did the train ___ Half an hour ago The film has been on since half an hour ago.（对划线部分since half when they h____ to the cinema,the film had been on for half His parents went to the cinema half an hour ago and they wil