The city at one time must have been prosperous, for it enjoyed a high level of civilization.想问下这句话中at one time 都可以放在句子的什么位置，可以放在been之后吗？还有must have been 是推测的用法吗，可以详细解释一下吗，谢谢~
...我在 VOA Special English看到这么一句话：【Dung, who has written for
the voice
of America Vietnamese-language website, is the president and founder of the
independent journalist association in Vietnam.】【范志勇是越南独立记者协会的创始人，曾为美国之音越南语网...
...杂志上看到这么一句话：The most important thing a
father can do for his children is to love their mother.【一个父亲能为他孩子做的最好事情，就是好好爱他的妈妈。】我想问，这里谓语动词is后面的to改成that可以吗？两者的区别我还是分不清，...
...ng a decision that involved high
risk, I went to a friend. He looked at me for a moment, and then wrote a
sentence containing the best advice I’ve ever had: Be bold and brave—and mighty
forces will come to your aid.请问句首的 once when...如何理解，如何翻译？
Nowadays those who call themselves intellectuals would insist on
writing essays in an obtrusive style IN WHICH are presented high-flown ideas
for the edification of the literati,rather than think of bringing light to the
younger generation in the towns and villages.
... Equipped with modern facilities, today' hospitals are quite different from _____.A. those of the past B. the past C. which of the past D. these past答案为A，C为什么不行？which不能代替前面出现的词么？which...
“Plants harvest energy from the sun and stores it as sugar inside the plant,” said Strano. “What we’re doing is taking some of that stored chemical energy and diverting it into illumination.”The light,about one-thousandth of the amount needed to read by, is just a start. The technology,St...
...s also related to the word procedural, which is sometimes used a term for a genre of television drama in which the plot revolves around a technical procedure, like the solving of a police case.be used 后面为什么直接就跟名词而没有介词？ 是省略用法吗？谢谢老师回答！
...ry learning to encourage creativity and the traditional chinese preference for a more guided approach to developing skills.1. 请问老师，the contrast 和some draw之间省略了that 是吗？2. to encourage creativity 是作定语还是目的状语？3. developing skills 是动名词吗？那 to...
What you really hope for is that whatever sub-B.A credentials people get, that they are portable at a minimum of across firms and ideally even across sectors and industries.老师好，请问that they are ……中that是什么用法？