He liked a wild life and Peru was much more like the country of giants where Tom had found him, than any place the big man had since visited.麻烦老师们帮我分析下since在这里的用法。这里的since可以理解为ever吗？
As the world's population continues to grow, the supply of food becomes
more and more of a concern. 老师，您好，请问 of+名词=adj.的这种结构中，名词前面不是通常是零冠词吗？如 of importance =
important，可是为什么上面这个句子中是 of a concern 啊？
This journalist is respectable/respected for his dedication,
warm-heartedness and his spirit of seeking truth from facts.老师好！这句话委培抹额填respected而不是respectable?
...ucture 800 million people around the world don't have safe drinking water, and even in the US, cities had to use bottled water instead of tap water.原文链接：Problems with bottled water – level 3 - News in Levels此句中“more infrastructure”后面直接接了“800 million people”是...
Tolstoy wanted happiness, but only hard-won happiness, that emotional fulfillment and intellectual clarity which could come only as the price of all-consuming effort.请问老师这里的as怎么理解?
The BBC
separately quoted senior sources as saying GM and TWG will pay an anti-dilution
fee, split between the 10 existing teams, of $450m to secure the entry.这句话的of$450m，和split都是修饰这个fee吧？两个分开了。
...样作为未知部分而进行。It is as a doctor that I respect him.Do you respect him as a doctor.I only as a doctor respect him.How do I respect him as a doctor ?感觉宾语附加状语说法好像并不成立，不知到问题出在哪里，希望老师能指出这里as a doctor 具体是那...
...，其他的统统都是真实条件句呢？例如I should be grateful if you would do that for me - 该句按传统语法，是虚拟句（婉转口气），但按现代语法，已经认为归类到真实条件句， 我的理解对吗？2）又如 If it should rain again, the flowers will bloom....
On the other hand,oil-importing emerging economies — to which heavy industry has shifted — have become more energy-intensive,and so could be more seriously squeezed.这个句子结构不太懂，这句话是什么意思呢？求英语高手分析!