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问题 until recently的用法

The problem is that catalysts and membranes have been expensive until recently.请问这里catalysts and membranes是最近才开始变贵，还是从以前到最近一直都是这么贵，还是说以前一直贵，但最近不贵了？还请教 until recently 是否有多种不同的用法？

问题 过去完成时用法疑问

John was given the same suitcase his father and grandfather ____ (take) with them to school.这里是不是可以填 took / had taken / would take三种？如果用 had taken 的话，会不会被理解为“已经被带去学校，而没带回来”，类似于had gone to 用法？谢谢

问题 省略的陈述句+附加疑问句

Visitors disturbe the factory routine.—Yes,they do,don't they?老师，这是哪种类型的附加疑问句？请老师帮我解答一下。

问题 earlier在before前面能不能省略

You must arrive 10 minutes earlier before the meeting begins.请问这句中的 earlier 可以省略吗？如果可以省略，它与不省略有区别吗？

问题 现在完成时结构的判断

"The only thing she's mentioned is a ballerina dress. It's priced at $ 125. She's been invited to some parties by her friends at school."she's mentioned 是完成时吧？

问题 all over的意思

I realize something drastic must be done, and I start all over at the beginning. 后半句译文：一切我又重新开始。  all over是什么意思?all是副词修饰start吗？over at beginning是在开始的整个阶段吗？

问题 and起连词的作用的疑问

Why people may prefer entrepreneurship and the major drawbacks to it.这里面and的用法我不是太理解, 根据我的经验。and起连词的作用。我感觉在这里面不太顺。

问题 句子结构分析(是独立主格结构吗)

For 10 years she has looked after her three children with her career very much on the back burner.这个语法结构没弄明白，这是独立主格结构吗？

问题 which 引导定语从句的指代问题

He used computer to establish a 3D model, which was imported into the ANSYS for overall analysis.请问这里的which的用法对吗，是指代 3D model，做定语从句吗？

问题 relaxed and dreaming作什么成分

The capsule began swinging gently sideways as we lay relaxed and dreaming.这个从句中,relaxed and dreaming作什么成分,有人说是主语补足语。

问题 otherwise的含义用法以及如何理解

When the concrete hardens, those otherwise harmful emissions are sequestered forever, before they even reach our atmosphere.句中otherwise什么用法，如何理解呢？如果去掉，语义有何变化？

问题 关于被动语态还原成主动语态

The sentence is formed from a verb and two nouns. 被动语态还原上是不是会省略了一些单词？ A verb and two nouns formed a sentence？ 这样对吗？少了个from？

问题 as引导的时间状语问题

I saw your sister ___as___she was getting on the bus yesterday.请问：as引导的状语从句不应该是持续性动作吗，这里上车应该是瞬时性动作吧，能用as吗？感谢老师们帮助！

问题 句型解析

It was only later that I realized  the  psychologist  had  tried  to  bind  me  with  a  hypnotic  suggestion meant for me and me alone.这里的 meant for me and me alone 是修饰 suggestion 的么？ 这里有两个 me  ...

问题 定语从句中可以做表语的关系词

I still remember the sweet little girl ____ she used to be.这道题填写that,who,whom都可以吗？谢谢指点！