Most of these diseases have been around for many centuries, but only inthe 20th century did doctors devise tests to identify them or medicines to cure them.请问这里为什么用or而是and，和倒装有关系吗，谢谢老师
Finding
the humor in situations can also lead to happiness. Find a way to make light of
a situation that would otherwise make you happy.我觉得最后的happy应该改为unhappy才通顺。“想办法看淡（缓解）本会使你不开心的一种境界。”
...后面吧？副词修饰句子的时候可以在前面或后面。比如：The children must learn how to behave properly in church.孩子们做礼拜时必须学会举止得当。He doesn't know how to properly tie a necktie.他不知道怎样正确系领带。
1.The city suffered heavy losses inthetornado.(lose)词典中标注lose [U][C,usually sing] 损失,那为什么该题lose用复数形式呢?2.If given the same treatment again, he is sure to get well.(give)这里为什么用given而不是being given呢？
Dr. Watson and I will spend the night locked in your room.不能理解locked in your room, 是否可以改写为：Dr. Watson and I locked in your room will spend the night.即"Dr. Watson and I locked in your room "是句子主语：过去分词短语作后置定语，如果进一步改写...
Recently I sent a postcard to my sister who was living in another town.My sister did not receive it and I was wondering why.Then one morning the postman brought a letter for me.,想问一下，为什么postman前用the不用a，前文他没出来啊。谢谢帮忙！
The United States Geological Survey (USGS) said
Sunday the island had experienced more than 500 earthquakes—13 with a magnitude greater than 4.0—inthe 24 hours following the 6.9-magnitude quake.The concern for residents continues to be the lava and
gas emitted from vents, though.官方译文：...
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？
...第一段President Vladimir Putin signaled Russia will aim new weapons at the U.S. if it stations missiles in Europe after quitting a landmark Cold-War-era treaty, amid growing fears of a new arms race.
station missiles与put missiles表达一致那么，为什么station用了一般现在式？
Despite official data showing the unemployment rate was 6 percent in April, up to 10 percent of people officially employed in China could actually be out of work，
...词，请问用法有什么具体区别吗？词典例句是这样的：...the widespread traffic in stolen cultural artefacts.He was sentenced to ten years in prison on charges of drug trafficking.请问这两句中的traffic和trafficking可以互换使用吗？为什么？
Attracting these would-be quitters is a reasonable strategy inthe
Netherlands, where politics is so fragmented that anything over 10% is a
good result. But it is a weak foundation to rely on for those hoping to
win more than half the vote, such as Ms Le Pen.《经济学人》上面的一个句...
...朋友住在加拿大。译文：He stayed in Canada with his friends all the way through high school. 我的问题是in Canada with his friends是否可互换位置。我现在觉得位置不可互换，因为我觉得all the way既要作时间状语修饰through high school成为 all th...
...国企业，正依靠提供定制化的国际服务在该地区获利。On the broad battle line, these manufactures put their antenna intothe ecosystem surrounding electric commercial service such as payment and logistics, and provide other service at the same time—such as games, take-out and co...