请问这里D为什么错了?When the mixture ______,it will give off a powerful force.A.will heatB.will be heatedC.is heatedD.has heated

请问这里D为什么错了?When the mixture ______,it will give off a powerful force.A.will heatB.will be heatedC.is heatedD.has heated It may be many years _______ the economic situation improves.A) when B) that C) after D) beforeIt may be many years _______ the economic situation improves.A) when B) that C) after D) before这里为什么不能用when 请问 He gives me the other when fifty 这里 when fifty是50元钱 1 I will never forget the days ____we spent together.A that B on which C when D on that 这道题为什么选A 请问B 和C为什么错了2 The vase ____onto the floor and smashed to pieces.A broke B crashed C cut D droped 请问这道题为什么不 Some of the girls can't help ______ when they hear the energetic music.请问这里是填dancing吗?为什么呢?麻烦讲解一下. I'm very furstrated when I heard that I had failed the exam.为什么这里用 furstrated 刚拼错单词了~I'm very frustrated when I heard that I had failed the exam.为什么这里用 frustrated 第六题.请问D为什么错了? Only when he reached the tea-house did he realize it was the same place he'd been in last year.为什么这里的realize不用过去式呢? with the window closed 这里的closed为什么加了d? when something that you know will ever be the same这里为什么要用when? when arriving,he found the door of the house__ yet the windows__.答案是closed,open请问closed在这里是什么用法和词性,为什么这里open是原型不是opened呢? The dog barks when someone_____(ring)the doorbell.请问这里该填ringing还是rings? she had dropped off her feet whilst she was running very fast across the road请问这里的whilst能用when代替吗?为什么 4.Do you know the year ______the Chinese Communist Party was founded?A.which B.that C.when D.on which请求帮助 这里 为什么不可以用D?C 和D 有什么区别在这里 英语非谓语的题___with the size of the whole earth,the biggest ocean does not seem big at allA.Compare B.when comparing C.Comparing D.When compared如果是C的话,这里为什么用主动 he_asleep when there_aloud knock at the door. A was just falling ;was D just fell;was请问为什么不能选D .语法没错吧?谢谢了帮我解决下 when must she go to the school?请问这里的go to the school.the在这里不加行吗?when must she go to school experts recommend to take some time to laugh when you get stressed out这里的to take 为什么错了?如题,为什么这里的to take 要改为taking?travelling gives us the opportunity of meeting new people,为什么这里的meeting 要改为to me