I haven't met him for ages, but his mother ________ him sometimes.A. had still seen B. still sees C. has still seen D. still saw老师，这道题我选的是C可答案是B。请问这是问什么？
As a discovery claim works its way through the community, the interaction and confrontation between shared and competing beliefs about science and the technology involved transforms an individual's discovery claim into the community's credible discovery请问老师句中划线的词involved,...
Much time___ sitting at a desk, office workers are generally troubled by health problems.
A. being spent B. having spent
C.spent D.spending
这道题目是独立主格结构，选择C，但是我疑惑的是为什么不是workes为spend动作的逻辑主语，我可以认为是w...
She looked into visceral fat—also known as the omentum, a part of the immune system. It wraps around the vital organs and protects them from infection. 这里wrap around的用法一般是wrap sth around sth那么为什么这里直接用了主动呢？如果wrap是当不及物动词，around...
Only the aberrations of my great-grandfather's relationship with horses have survived, as when he would be bathe in the river with his favorite horses, or when, as my grandmother told my mother, he insisted on conceiving his ninth child in the stall of a bay m...
He, being no silent mute, will tell you the truth.老师好，对分词being no silent mute，我有两个疑问：一是being no 和being not有何语意区别？二是既然可以写not being a silent mute，那可以写no being ……吗？
No other incumbent president in the past three decades has enjoyed such a high percentage of people saying they feel better about their economic situation....of people saying they... 这里saying是动名词还是现在分词呢？根据句意，为什么不是...of people having said they......
You'd better see Dr Wang about that cough.Did he often come to the hospital on consultations?...Nina,you should have faith in doctors ,especially in DR Wang,he is a very experienced expert....我不太理解这组对话中，那几个介词短语的作用，想请老师讲解以下,谢谢
This is the first time a large group of scientists have jointly used the word "emergency" when talking about climate change. first time 后面是不是省略了关代 that ？如果是，那 that 引导的是不是定语从句？如果是，那 that 后面是个完整的句子，...