本篇为此类文章第一篇，旨在收集来自各个方面的英语段落节选。
一.材料出自：2019年天津卷高考题第7题（2020.1.25）
_______ the average age of the population（一般不加s） increases, there are more and more old people to care for（不定式做后置定语）.
A: Unless B: Until C: As D: While
答案：C
引申考察方向
1、关于As（跟句子）
1-1：随着......
As the story develops, the truth about the strange figure is slowly discovered.
随着故事的发展，这个奇怪人物的真实情况也逐渐被发现/浮出水面。
1-2：因为......
1-3：当......
2、关于Unless, 除非......，强调条件唯一性。
I will not accept her apology unless she promises to make more specific compensations.
我不会接受她的道歉，除非她能作出更详尽的赔偿。
☆3、关于While
3-1：尽管/虽然（放在句首，引导从句）
While our school does not encourage us to pay additional attention to science subjects, it has never been tired of informing us of the importance of them.
尽管我们学校不鼓励我们额外关注理科，但是他们从来都告诉我们理科的重要。
3-2：表对比（放在句首，引导从句）
While our school does not encourage us to pay additional attention to science subjects, my sister’s school does it.
虽然我们学校不鼓励我们额外关注理科，但是我妹妹的学校是的。
3-3：然而......，（放在后句句首）
We thought great efforts could lead to great performances, while it was not always the case indeed.
我们一直觉得，努力就可能导致好的结果，然而事实并非总是这样。
3-4：当......（连接前后两个句子，不用逗号）
Sb is was doing sth while sb is was doing.
某人正在做......时某人正在做......
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不定式做后置定语
There are a lot work to do.
这里有很多工作需要去做。
There are more proof to find out.
这里有很多证据需要查明。
There are more application qualifications to meet.
还有很多申请的条件需要满足。
Application qualification申请的条件和资质
Meet 满足