12.—What did Jack ask you just now?—He wanted to know how long _________ when I reached the最后单词是cinemaA.had the film been on B.the film had startedC.the film had lasted D.had the film ended为什么选c 为什么,

12.—What did Jack ask you just now?—He wanted to know how long _________ when I reached the最后单词是cinemaA.had the film been on B.the film had startedC.the film had lasted D.had the film ended为什么选c 为什么,
12.—What did Jack ask you just now?—He wanted to know how long _________ when I reached the
最后单词是cinema
A.had the film been on B.the film had started
C.the film had lasted D.had the film ended
为什么选c 为什么,

12.—What did Jack ask you just now?—He wanted to know how long _________ when I reached the最后单词是cinemaA.had the film been on B.the film had startedC.the film had lasted D.had the film ended为什么选c 为什么,
这里how long _________ when I reached the是know的宾语,要用陈述句语序,排除AD,然后how long表示要用延续性动词,所以不能用start
刚刚jack问你什么?——我想知道当我到电影院的时候电影持续多长时间了

宾语从句使用陈述句
所以A和D错了，他们是疑问句
last延续动词可以和how long 连用，start不可以

A 项中， had 提前了，这里不是独立问句，而是从句，所以助动词had不能提前到主语film前面。

A　　项中　had　提前了50这里不是独立问句452而是从句imq所以助动词had不能提前到主语film前面6