China is going to use AI to protect the Great Wall．Great! AI is so helpful that people_____use it in many fields now．A．Must B．can C．should请问这题要选什么？答案说选C，但我认为B更合适。各位老师怎么看呢？
An opportunity is something that, ____, by no means you will get back.An opportunity is something that, ____, by no means you will get back.A. if you lose B. when lose C. once lost D. after losing书上的答案是C，请问老师，为什么不选A？
有没有a great deal of a master的用法？例如：he is much of a master他大有大师风范。he is little of a master他几乎没有大师风范。那有没有he is a great of a master？或者有没有he is a little of a master？

Itis not until he returned to his hometown __________ the great changes that had happened. A. did he find B. that did he find
C. that he found D. found he that 老师，这题选择C，但是为什么不是not until 的倒装句呢？ 我选择B，强调句的...
...:When the traffic is really heavy,his commute is stressful.
It would be great if he could work from home one or two hours a week.
这句话中it是做形式主语吗?如果是的话，真正主语是if引导的主语从句，可if引导名词性从句时意思是“是否”，可这里if是“...
...的人都有机会发言。正：All the participants in the debate had an
opportunity to speak. 误：All the participants in the debate had opportunity
to speak. 我们班人人有电脑。误：Everyone in our class has a computer.正：Everyone in our class has a computer.3. 不能与指示代...
Itis no use crying over spilt milk. Itis no good objecting. Itisgreat fun sailing a boat. 这里看做动名词后置定语修饰名词也没错？She is working harder than average people are.为什么这里句尾要加be动词？
...erything we want. Economics deals with this problem through the concept of opportunity cost, which simply refers to whether someone’s time or money could be better spent on something else.Every hour of our time has a value. For every hour we work at one job we could quite easily be doing another, ...
1. how引导复数可数名词时，感叹句是怎样变的？What great inventions he has made！改成how引导的句子如何变呢？2. how 引导不可数名词时，句子怎么变？What bad weather itis！改成how引导怎么变？3. The road is crowded. 改成what引导的句子：是Wha...
请问一下。This fact proves the greatness (great) of the novel and the unique position it has in the long history of Chinese literature.great可以写成greatest吗？(1)adi+of+n，这是我的想法，可不可以这样呢？(2)greatest of the novels中greatest是指代吗，只有它才可以...
He made another wonderful discovery, ___A___ of great importance to science.A. which I think is B. which I think itisC. which I think it D. I think which is
As residents of San Francisco have found, a rich city isgreat for the rich, but it’s hard on everyone whose labor is not valued as highly as engineers.请问各位老师以下问题：1. as residents found是方式状语从句吗？2. 如果变成as residents found it是否违反空位（gap）...