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问题 vary between与vary among的区别

Diet varies _______ different countries in the world.A. between               B. among 请问如何选择？同时请老师具体谈谈它们的用法。

问题 门牌号码中的数字如何读

听有人读门牌号码有两个疑问：1. 有人把 532 Free Street 读作：five thirty-two Free Street，为什么不读：five hundred and thirty-two Free Street 或 five three two Free Street 呢？2. 门牌号中的数字0如何读？是读作zero还是读作字母o?

问题 元音音素后面那个带括号的（r）如何拼读

suffer 英[ˈsʌfə(r)] 美[ˈsʌfɚ]  vi.受痛苦; 受损害; 变糟; 变差;vt.忍受; 容忍; 容许; 遭受;老师，元音音素后面那个带括号的（r）如何拼读？

问题 again,once again, once more, re-的区别

请教老师：again,once again, once more, 前缀 re-这四组单词短语的区别。非常感谢。

问题 句子间没有连词的问题

...... 另外请教 We have to preserve what we believe is valuable这句的句法结构，这句中省略了那些成分,谢谢！

问题 be set to do 的句式分析

老师 be set to do sth, 这里的 be set to 是否可以看作半助动词？应该他也有情态意义。如例句，The trial is set to last two weeks. 辛苦老师解答。

问题 副词和形容词的顺序到底怎么排

Last night we met with ___rain at the station. A.a quite heavy B.too heavy a C.such heavy a D.a so heavy请问副词和形容词的顺序到底怎么看？

问题 have sb home的含意

bring sb home vs take sb home vs get sb home vs have sb home vs see sb home vs walk sb home vs send sb home vs drive sb home 英语口语中有这么多用法，分别用在不同的语境中，请老师辨析一下

问题 倍数的as..as结构问题

倍数 的as ...as 结构究竟怎么用呢？ 名词放在as...as内,还是紧跟这倍数？ 而as..as内的many是什么意思啊?There are three times (people) as many (people) as we expected. There is three times (water) as much (water) as we expected. 

问题 can have done的疑问

...p;2) Time permitting 等于If time permitted,是吗？因为是描述过去的事情。

问题 过去将来时与虚拟语气的区别

能有人系统帮我理清一下，过去将来时与虚拟语气的区别吗？万分感谢!对于could/might/should/would有时候代表过去，有时候代表虚拟，有时候不代表不过也不代表虚拟，而是代表现在一般时，能不能推荐一本能把这些关系讲明白讲...

问题 句子翻译(涉及to be considering的理解)

It felt acutely awkward and ill-timed to be considering this kind of conversation while they were being engulfed in grief.这里的to be considering怎么理解?

问题 in groups与in pairs的区别

下面这句摘自高中英语新教材人教版必修一 p3：Work in groups. Choose one of the situations and make a conversation.请问这里的 in groups 可以换成 in pairs 吗？

问题 convention词条释义的句子成分划分

牛津高阶英汉双解词典第9版中，convention的释义为 the way in which sth is done that most people in a society expect and consider to be polite or the right way to do it。这里该怎么划分成分。谢谢老师！

问题 非限制性关系分句前面的and

He acted in two films, and one of which was directed by Zhang Yimou, didn't he?原文是一段高中听力原文。这个and是干嘛的？我认为是多余的，难不成关系分句还能和主句并列了？