When nothing better offered, a walk to Meryton was necessary to amuse their morning hours and furnish conversation for the evening.每逢没有更好的事情可做，就必定往梅里顿跑一趟，这样早晨可以消遣消遣，也为傍晚的闲聊搜刮一点谈资。better offered为过去...
Whenever someone needs help, friends from all over the world can immediately provide useful suggestions and information.这句话两本辅导书一本书说whenever引导的时间状语从句，一本是让步状语从句，那应该是什么呢？
Researchers trained mice to press levers in response to certain cues
until the behavior became a habit.这里的in response to该当什么讲？应该是训练老鼠一收到cues信息刺激就会press levers？检索到这个问题 https://www.cpsenglish.com/question/27367老师在这个问题里...
But the first people who were like ourselves lived so long ago that even their sagas, if they had any, are forgotten.1. 这里的 that 作用，什么从句？2. 这里的 if 又是什么？3. are forgotten?
They were the last people you’d expect to be involved in anything strange or mysterious, because they just didn’t hold with such nonsense.老师、to be involved in anything strange or mysterious不定式作宾语吗？是不定一般式的被动形式吗？不定式的动词，没有先于谓...
both sides accept the agreement a lasting peace be established in this region.A.Only if; will B.If only; would C.Should; will D.Unless; would老师，这题A，是倒装句，但是为什么...
It was not until man had learned how to make iron and steel that the constructionof various machines _ possible.A.were madeB.had madeC.madeD.was made请老师帮我仔细划分句子成分再逐一给四个选项解答，最后在详细说明not until的用法，谢谢。