Question

—What did Jack 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 lasted	D．had the film ended

Answer 1

C

考查宾语从句和现在完成时。know后是一个宾语从句，用陈述句语序，排除A、D；how long指的是一段时间，start是短暂性动词，不能和一段时间连用；last“持续”，是延续性动词，可与一段时间连用。故选C。