Able to find out the method of goal achievement or solution/countermeasure for the purpose of goal 这句话的中文意思是什么?

We haven’t been able to find out the ___ of the rumour.A. sourceB. causeC. originD. reason Able to find out the method of goal achievement or solution/countermeasure for the purpose of goal 这句话的中文意思是什么? Only in that way( )find out how this kind of animal lived and then finished the research on time.A. could they B. they could C. were they able to D. they were able to Only in that way _____ find out how this kind of animal lived and then finished the research on timA.could theyB.they couldC.were they able to D.they were able to 选哪个?为什么? find out 这个短语,如下I want to find out the reasonI want to find the reason out 哪个对 the police tried to find out who m___ the man She ___(find) out the way to the small village they won't be able to find people to work down coal mines in the future He thought the police would be able to find the ( ){own} He was able to run away before the war broke out.可否将 was able to 改为could为什么? what if 句子意思what if you've been able to find out 这里的what if 什么意思. your task is to find out the cost by to find out the inside beauty of yourself 求翻译 英语翻译you may get fined if you give somebody a lift on your bike.we may not be able to find the machine we need.she said she might not be able to come to themeeting.i thought the book might be too difficult for us.you needn't copy out the whole Please go to the station___when the train___ A.to find out;leaving B.to find out;leaves C.to find;will leave D.to look for;leaves 是He hoped to find out who stole the vase还是He hoped to find out who stealing the vase不是 find out sb doing sth The fire spread through the hotel very quickly but everyone was able to get out did you find out when to take the pie out of the oven,求翻译