问题 as occurs on highways 这句话的主语是不是省略了

This thesis is concerned with a particular case of the above problem in which all toll arcs are connected and constitute a path, as occurs on highways.

问题 分析:Wear a mask on days when there is heavy pollution.

Wear a mask on days when there is heavy pollution.请帮忙分析句子。

问题 when 从句的用法疑问(好像用在了不是表时间的地方)(请教张老师)

on 有一个特别常见的用法；on the group, on the staff.     剑桥词典中这样解释这个用法；  "on" used to show when someone is a member of a group or organization:  按字面的理解是说on表明某人是某个组织成...

问题 这个on which引导的定语从句应该如何理解？

...man aircraft destroyed were bombers, so the‘exchange rate’in fighters, on which decision the Battle of Britain would turn,stood even.红色部分是定语从句吗？应该如何理解？the battle of britain是decision的定语吗？希望老师解惑，谢谢！

问题 如何理解：on the day is, as al

有这样一个句子：What the weather will be like on the day is, as always, the great unknown. 句子开头的What the weather will be like比较好理解，但后面部分的on the day is, as always, the great unknown就不好理解了，请专家老师指点，谢谢！

问题 翻译：The stress can be on the auxiliary or the subje

The stress can be on the auxiliary or the subject.请问老师这个句如何翻译？

问题 on top of 为什么不加定冠词the

It suddenly occurred to one of the workers to open up the box. He was astonished at what he found. A man was lying in the box on top of a pile of woolen goods. He was so surprised at being discovered that he did not even try to run away. After he was arrested, the man admitted hiding in the box befo...

问题 On the bus ride into school today.这句话的句子结构是？

On the bus ride into school today,we passed by Gramma's house.

问题 a reflection on 和a reflection of的区别

问题 take a trip, go on a trip 区别

问题 on my holidays还是in my holidays

表示“在我的假期里”，用什么介词？是 on my holidays 还是 in my holidays？谢谢！

问题 I'm going to take a trip on sunday有错误吗

I'm going to take a trip on sunday.这句话有错误吗？为什么？

问题 be fixed on,be fixed in, be fixed to的区别

我在不同场合分别看到be fixed on,be fixed in和be fixed to三种用法，但没有查到具体使用规则，请教老师。

问题 I insisted on doing most of the baking myself

这是2015陕西高考改错题目。I insisted on doing most of the baking myself.这句话的myself似乎不对，如果是强调I, 似乎没什么必要。如果强调自己做，是不是应该用do it by myself?

问题 him on the sofa 和 me in a chair 是独立主格用法么

We sat in the living room, him on the sofa and me in a chair opposite.请问 him on the sofa 和 me in a chair 是独立主格用法么？