We__the work on time without your timely help.( )A.had't had finished B.didn't have finishedC.can't have finished D.couldn't have finished C,D同样是对过去的否定判断,句子中没有时态应该选C,为什么答案是D?请说明一下原因,

We__the work on time without your timely help.( )A.had't had finished B.didn't have finishedC.can't have finished D.couldn't have finished C,D同样是对过去的否定判断,句子中没有时态应该选C,为什么答案是D?请说明一下原因, we__the work by six o,clock yesterday evening.A.had finished B.finished. We must finish our work on time 被动语态 We must finish the work on time 变被动语态 We must finish our work on time 被动语态 We found it diffcult ( ) [finish] the work on time . 改为被动语态We can finish the work on time. What do you spend your time on work and study They finished the work ____(perfect)on time. i am s_ i can finish the work on time I can e__ finish the work on time work on it began after my sisiter left last time. She must does her school work on time的错误 _____(hope) ,they can finish the work on time YOU LL NEVER GET TO WORK ON TIME HAHA Whether the work can be completed on time is doubtful.. He failed to finish the work on time.=He didn't _______ ________ to finish the work on time. Remember to finish the work on time.改为同义句（）（）to finish the work on time.