Jack told his mother the cat ______ the table, but the truth was that he did it.
A. knocked off the vase
B. knocked the vase off
C. knocked out the vase
D. knock the vase over
请问老师，选D或者A有什么不妥吗？正确答案是B，谢谢老师帮助。
The ruling Communist party's policy allowing all couples to have two children came into force in 2016, leading to a 1.3m increase in births that year compared with 2015.译文：执政的共产党允许所有夫妇生育两个孩子的政策在2016年生效，导致该年出生人数比2015年...
_______ did you begin to study French? I ________ to study French when I was seven.A. When, begin B. When, began C. While, beginning D. While, was beginning.这个选什么？为什么？能分析下吗？谢谢!
The cumulative theory of linguistics as a natural science has recently been called “basic linguistic theory”. 用软件翻译的结果是：语言学作为一门自然科学的累积理论最近被称为“基本语言学理论”。请问这句中的 the cumulative theory of linguisti...
They can appear as a red tide in the daytime but when disturbed at night, however, they glow bright blue.这个句子既出现了but，也出现了however。它们可以同时出现在同一个句子中吗？请老师解答一下，谢谢！
I am going to give each class three times a week, so I can hit as many people in as many time zones as possible.这是美国教语音的老师说的，没看懂I can hit as many people in as many time zones as possible. 怎么会有as...as...as possible - 3个as ?这个as比较句没看懂，麻烦...
...态要后退，下面的句子
我不能理解：I checked the orders instantly. That’s when
we realized we made a mistake.犯错误这个动作发生在 realized 之前，为什么不用过去完成时？我了解主句是said，told 那种，但是像 realized 这种，如何理解呢？
Take the following example: a spiritually shallow person growing aware
of his own futility in the course of engaging in the endless reflections
imposed by science.句中growing aware of ... 做后置定语修饰person。但是growing我查了词典只有形容词词性，而aware是形容词，感...
...1的听力Text 2有如下内容：M: Ruth, I’ve got this terrible cold, and I have to see a
doctor. I’m afraid I can’t go to the class. Could you help me hand in my lab report to Dr Davidson? W: Sure, no problem. Just take care of yourself and don’t worry
about the class. 请问lab report ...
...。We arrived at the same time as you did. 我们与你同时到达。He is the same age as you are. 他和你同龄。疑问：这些句子中的 as 是连词还是关系代词？传统语语法认为是关系代词，引导的是定语从句；但感觉根据专家老师前面的一些分析，as ...
The mother's health was judged on her height-to-weight ratio, her diet, amount of physical (active), smoking status and how much alcohol she drank.空格处填的是activity, 我想问能不能填activities 呢？
...备等含义。”并举了此例句：Though everyone desert you, I will not. 然而在183页又说：“were-型虚拟式常用于由if, if only, as if, as though, though引导的条件状语和让步状语分句中，表示非真实的条件或让步。并举了此例句：Though the whole w...
bad weather前到底何时用定冠词，何时不用定冠词？有时见到 bad weather，有时又见到 the bad weather。如：Owing to the bad weather the match was cancelled. 由于天气不好，比赛取消了。A spokesman said that bad weather was to blame for the delay. 发言人称，...