We haven’t been able to find out the ___ of the rumour.A. sourceB. causeC. originD. reason

we haven't been able to stand each other for the last 46 years. We haven’t been able to find out the ___ of the rumour.A. sourceB. causeC. originD. reason I haven't been able to be outdoors for so long haven't been 为什么要用 I don't understand why you __your mind constantly!We haven't been able to decide where to spendI don't understand why you __ your mind constantly!We haven't been able to decide where to spend our holiday,you know?A.change B.will change C.are changing but I still haven't been able to lose more than a pound or two. The lizards seem friendly,but I haven't been able to catch one yet.的翻译 I hope so.I haven't been able to fall a___ for days. I wonder if it's because I haven't been able to be outdoors for so longI haven't been 是什么时态 现在完成时被动语态吗? I don't understand why you _____ your mind constantly!We haven't been able to decide where to spend our holiday,you know?A.change B.will change C.are changing D.have changed为何不选A We( )the problem for quite some time,but we( )any conclusion yet. A.have been discussing.haven't reachedB.have disscussed.haven't been reaching C.discussed.haven't reachedD.had discussed.haven't reached What is one talent of yours for which you haven’t been able to master a particular skill?求翻译 i haven't been able to answer his letter.perhaps i would next week这里用would 为什么不行,will be able to 怎么可以? 反义疑问句区分We have ever been to Shanghai,haven”t we?You have a headache,don’t you?为什么第二句后面不是haven't you? haven't been in,have/haven't been to,have/haven't gone to we wrote test from english.an it haven't been so good, haven't been told what to do next.改为同义表达We haven't been told what __ __ __next.We haven't been told what to do next.改为同义表达We haven't been told what __ __ __next.2What' more=_____ ______4.This key is used for opening the front 英语翻译Dear Mom,I haven't written many letters to you before,as we've almost alway been able to pick up the phone and have a chat,so it's hard to know how to start.We all miss you and hope you're all right wherever you are .When you left us,it t I .make new friends since i moved here.A.can't B.couldn't C.haven't been able to.D'm not able to请帮我选正确答案以及原因