Schools remain very much what it has always been, and what changes have occurred cannot be attributed to technology.老师好，请问主语从句what changes have occurred 中what充当什么成分？
Beneficiary's certificate certifying that no prisoner and no children have been emplyed in the production of products comprised in this L/C.请教老师：1. 此处certifying 用法; 2. 我感觉从语法和句意上来说certifying都能舍去，请问老师对吗？
原句是The English language teaching sector directly earns nearly &1.3 billion for the UK in invisible exports and our other education related exports earn up to &10 billion a year more.网上对这个短语众说纷纭，感觉都不太对。
... has never served so much to connect different peoples and nations as in the recent events in Europe.请问这个as应该怎么翻译？网上有人说这里的as...是作比较状语的，可是我个人觉得as应翻译成“正如”，可是如果是这样的话，不就...
... shuttle—developed with an eye to keeping money flflowing to contractors and nasa facilities rather than in order to do the job at hand expeditiously. rather than in order to do这里为什么是to do？
...th its “boring as hell” European
counterpart. He relishes the returns and cash that it generates, much of
which come pouring out in the form of dividends.come是comes笔误还是虚拟语气呢？谢谢各位大咖专家老师！
...meaningful sound track is often as complicated as the image on the
screen, and is ultimately just as much the responsibility of the director.1.这里的just as much这里是什么用法，省略了什么？2.just as much在这里是同级比较还是表示程度？如果表示程度，后面不是...
...word in China, Sheffield had fought in the U.S. Civil War. He was fearless and determined. Even after surviving an apparently random attack from a mad Chinese carpenter that left Sheffield with more than thirty wounds, he was undeterred. In the early 1880s, Sheffield began contemplating the use of s...
In Sri Lanka, some 1600
kilometres west of the quake cnetre, the number of deaths stood at 2498, and
one million more were affected by the tsunami, government officicals said.句子来自2019版人教版高中英语新教材必修一的 Unit 4（p54）。请问句中的 stood 是何用法？
... privilege was to advance
public purposes such as building roads, bridges, and canals.以上出自一篇专八改错题，我认为错误点是在于historical后面缺一个名词成分，但参考答案是把which改成where，请问各位老师，为什么参考答案要这样改？