下面一句摘《剑桥高级英语语法》（Advanced Grammar in Use）第52.3节的练习答案：Fewer students walk to university now than they did in 1980.感觉句子有问题，应该去掉 they did 才对吧！即：Fewer students walk to university now than in 1980.
...nbsp;we'll start by going back thousands of years. Most ancient cultures had weather gods, and weather catastrophes, such as floods, played an important role in many ...
As if in keeping with the sadness of departure, the weather had turned gloomyy1) in在上句何意，可否去掉，变成As if keeping with...？2) as if 后接do/doing/done形式都可以吗？3) 为什么主句使用了过去完成时had turned, 而不是一般过去时turned？我没想通，我...
So
the results of China’s seventh census, conducted last year and released on May
11th, were big news.本句中，conducted修饰China’s seventh census，而released修饰the results，尽管通过逻辑判断不会出现歧义，但我觉得不够优化。各位老师怎么看？
The United Kingdom of Great Britain and Northern Island, also called
the UK, is an island country.句中的“also called the UK”是过去分词作后置定语还是同位语呢？另外想问一下，哪些可以作为同位语？
...earch confirms that the findings concerning senior citizens can be applied to restless children. They are more easy-going when there are animals around, with whose company they tend to calm down more easily.为什么红色部分的 whose 不能用 their，为什么用 their 要在前面加个 and?
KIRA BIRDITT: "The husbands were more likely to use the constructive strategies like discussing the problem, finding solutions, and the wives were more likely to use those destructive or withdrawal strategies." 博蒂特：“丈夫们更多采用建设性的策略，例如讨论问...