It's a great feeling to think you're a small part of the reason that a kid decided to give school another try instead of dropping out or that a kid had the strength wp walk away whe someone offered him drugs.the reason that 后面应该是同位语吧？为什么教材后...
So for a company in this situation, keeping up to date with the latest technology, even if it's only for the benefit of key staff, this can be hugely expensive.
请问老师，keeping up to date with the latest technology是什么成分
...is吗?The country has （been/gone) through a drastic reduction in its birth rate _______ facing labor f shortage. 请问下老师：has been through 和 has gone through是不是都可以用？
后半句直接facing开始可以吗？还需要加is吗？
He had already sent one message to the police about Selden,and (He had already sent )another to his boy to stop him (from) taking food to the hut.老师，这句话能看作是并列句的省略，省略了He had already sent ；from是否省略了？
...hat women have outgrown the jumping-on-a-chair-at-the-sight-of-a-mouse era and a major who says that they haven't.参考译文：如今的女人已不再是那个看到老鼠就跳到椅子上的那个时代的女人了。动词 outgrow 和宾语 era 这个搭配怎么理解？outgrow...
The wind blew in from the desert and covered everything with sand.Then from behind this door I heard a terrible sound.老师，第一句把in省略，意思没有发生改变吧；介词接介词短语的情况多不多，主要有那些单词？
...elative pressure of 0.99 corresponds to a pore size (diameter) of 193.5 nm and hence the total pore volume indicated is the pore volume of pores smaller than 193.5 nm diameter.这个句子中indicated做的什么成分啊，感觉不是独立主格结构，因为没有逗号，也不是过去分词...
...ions in our climate as opposed to the oceans, which cover70% of the planet and have 1,000 times the heat capacity of air, or the output of our sun, is scientifically disturbing.这里的 arguing 是动名词还是现在分词做状语啊？
句子：We believe that’s best done on the basis of sound facts and science, the foundation for the coverage you’ll find in this special issue.问题：老师，best和done在句中是什么词性？什么语法成分？是that's best/ done on the……，还是that's best done/ on the...
Children everywhere still need to be immunized, and children whose immune systems are weak,sometimes get a type of polio that's shed from the vaccine into sewage.不懂that's shed from the vaccine into sewage.这句话的语法结构和成分，请教老师分析。谢谢！
...Economist’s equivalent of op-eds—of which we publish several each week and which have become increasingly popular in recent months.请老师看一下，这里是不是非限制性从句，这里的which指代的是前面什么成分呢？