If we_______200 years old,we______everything.A.were to be,could change B.had been,changed C.were,would have changed D.should be, changed.这道题，C为什么不对，从句对现在事实的虚拟，主句对过去事实的虚拟。就像“我要是...
It could be anything—gardening,cooking,music,sports—but whatever it is,______(make)sure it's a relief from daily stress rather than another thing to worry about.填的答案是make。第二个破折号（红色的）在语法上有什么功能？but连接的是哪两个句子？
-Why is he so slow? He has to carry his shell on his back.-Why has the tortoise got that shell thing on his back?...这个语法术语有点搞不清,例句中都有宾语了,句意还不完成,所以后面加一个介词短语,而这个部分就叫宾补吗?
At the shop, they wanted to show me all the dresses, but I was
interested only in the one in the window.各位老师好，请问这里的the one为什么不可以用that呀？是因为介词后面不可以用that吗？
-- I was trying
to repair that stupid machine, but I failed.-- Well,
you_______.A. needn't do
that B. needn't have done C. needn't have D. needn't这道题该选哪一个呢，如果B是needn't have done
that是否正确？dare和need在省略方面的用法一样吗？
...篇介绍筷子的文章中有一句话：What's been really interesting to see is that as Asian cuisine has moved from the east into the west.我认为这句话单词what后面的系统词is和单词see后面的系动词is重复了，如果我这个想法不对，请详细解释分析一下这句...
The United States Department of Agriculture says 253 million turkeys were raised from January 2013 through September. 美国农业部称2013年1月到9月期间养殖了2.53亿只火鸡。这个 through 换成 to 不是更好么？没见过 from A through B 的用法，这种用法多么？
To me, the movie not only presents an unforgettable scene but also acts as a timeless reminder that we should not develop the tourist industry at the cost of our eco-enviornment.我的问题是：这里的 that 是什么用法呢，难道是定语从句么，that 状语，感觉行不通啊，为什...
External interests, it is true, bring each its own possibility of pain: the world may be plunged in war, knowledge in some direction may be hard to achieve, friends may die.请问：each its own是什么意思？
I visit my grandparents four times a month.上文中的visit是do (to) visit的省略形式还是缩合形式，visit是简单的一个普通的单词呢？还是一个类似于can't,am eating,have drunk，would go这样的复合形式呢?谢谢回答。