... at holding their breath under water even before they can walk.文中这里的expert 为什么不是复数呢，还是说文中的意思其实是“他们变得擅长游泳”，而不是“变成了专家”，所以不用加s，老师我这样理解对吗，或者我造个句子：I became expert...
The reason is why I think on the top of the causes might come the drive
of interests.1. The reason is why…的句式是什么意思？2. on the top of the causes might come the drive of interests是倒装句吗？主谓宾怎么划分？这里的come如何解释？
The U.S. doesn't
even rank in the top 40. But is also was included "because we live
here" and because of past, bold estimates that life expectancy in the U.S.
might surge dramatically in this century, Olshansky said.这句话的but is also有省略吗？感觉很怪，补全是怎么样的？
这是2012年高考英语浙江卷阅读理解B中的一个句子：The 2008 Guinness World Records Day was, according to GWR, their
biggest day of recordbreaking ever,
with more than 290,000 people taking part in record attempts in 15 different
countries. Kenichi Ito’s record attempt was part of ...
...tuting 35% and 30% respectively.这句话源自剑桥雅思真题8考官给的写作范文。图中显示35%的土地流失是因为过度放牧，30%是因为滥砍滥发。本句话“constituting...”的逻辑主语不应该是本句话的主语，也就是“65% of
degradation”吗？可是现...