--What did Bob ask you just now?----He wanted to know how long when I reached the cinem

问题补充：

----What did Bob ask you just now?

----He wanted to know how long when I reached the cinema.

A. had the film been on

B. the film had started

C. the film had been on

D. had the film ended

答案：

A. had the film been on

B. the film had started

(答案→)C. the film had been on

D. had the film ended

解析：英语宾语从句中一般为陈述语序。句意：刚才鲍勃问你什么了？——他问我当我到达电影院时，电影已经开始了多长时间了？结合语境可知宾语从句中描述的是持续到过去某时的动作，故用过去完成时态。Start表示瞬间动作，故选C。