2．What do we know about those who first dug for gold in Dawson? A．Two-thirds of them stayed there. B．One out of five people got rich. C．Almost everyone gave up. D．Half of them died.
[解析] 细节理解题。根据文章第二段最后一句“Of the first 20,000 people who dug for gold, 4,000 got rich. About 100 of these stayed rich men for the rest of their lives.”可知，在最初挖黄金的两万人中有4 000人变富有了，所以是五分之一的人变富了，故B正确。
[答案] B
3．What was the main reason for many people to leave Dawson? A．They found the city too crowded. B．They wanted to try their luck elsewhere. C．They were unable to stand the winter. D．They were short of food.
[解析] 细节理解题。根据文章最后一段中“and when they heard there were new gold discoveries in Alaska, they left Dawson City as quickly as they had come.”可知，人们离开Dawson的主要原因是听说在Alaska发现了黄金，也就是他们要去别的地方寻找发财的机会。故B正确。
[答案] B
4．What is the text mainly about? A．The rise and fall of a city. B．The gold rush in Canada. C．Journeys into the wilderness. D．Tourism in Dawson.
[解析] 主旨大意题。第一段简要介绍城市发展的原因，引出Dawson这一城市的兴起，第二段介绍了该城市兴起的原因，第三段介绍人们选择离开该城市的原因及现在的状况，所以全文围绕Dawson这个城市的发展变化展开。故A正确。
[答案] A Ⅳ.七选五阅读填空
(2019·河北保定市高三第二次模拟)We all know that a hot, milky drink and a warm bath are supposed to relax you before bed, but many of us still can't slip into sleep. Here are some tips to help you go to sleep.
●Breathe in through your left nostril(鼻孔)
1____. Sleep specialist Peter Smith says，“Lie on your left side, resting a finger on your right nostril to close it. Start slow, deep breathing in the left nostril.”Peter, author of Sleep Better With Natural Therapies, says this technique is particularly good when overhearting is preventing sleep.
●____2____ Relaxing all your muscles can prepare your body for sleep. Anxiety expert Charles Linden says：“Lying on your back, take a deep, slow breath in through your nose and, the same time, squeeze your toes tightly as if you are trying to curl them under your foot, then loosen them slowly. Breathe again, contract your leg muscles, then your thigh, belly, chest, arms, and so on until you heat all the way up your body. ____3____. ●Try to stay awake
Challenge yourself to stay awake—your mind will fight against it！“It's called the sleep paradox(悖论)．”Says psychotherapist Julie Hirst. She explains：“Keep your eyes wide open, repeat to yourself ‘I will not sleep’．____4____. But instead view this as an instruction to sleep and eye muscles tire quickly as sleep turns up.”
●____5____
Use at least three senses imagining yourself in a situation where you feel content—a paradise(乐园), sailing on calm waters, walking in flower fields.
A．Just imagine B．Enjoy a paradise C．Squeeze and relax
D．The brain doesn't process negatives well E．You must repeat what you have done
F．This yoga method is thought to reduce blood pressure and calm you
G．When you have gone from head to toe, you should feel ready for sleep
语篇解读： 本文是一篇说明文。本文叙述了如何让你快速入睡的四个小窍门。
1．[解析] 本句考查文章的上下文的过渡句。根据小标题“Breathe in through your left nostril(鼻孔)”可知，“用左边的鼻孔吸气”是瑜伽降压的一种方法。分析选项可知F项(人们认为这一瑜伽方法可以降低血压、使人镇静。)起承上启下的作用，符合题意，故选F项。
[答案] F
2．[解析] 本小题是主旨概括句。分析标题下的内容可知，本段主要讲给肌肉放松，做好睡觉的准备。文中出现了“Relaxing”“squeeze”和“loosen”。其中Relaxing和loosen是同义词，都是放松。故选C。
[答案] C
3．[解析] 根据本小题的上文可知，按压是从头到脚的按压，
这是为睡觉做好准备。分析选项G项(当你从头到脚按压时，应该呼吸平稳，按完之后会有想睡觉的感觉。)符合题意。故选G项。
[答案] G
4．[解析] 本空所在的小标题为“Try to stay awake尽量保持清醒”，根据本段的第一句“Challenge yourself to stay awake—your mind will fight against it! ”让自己保持清醒，大脑会产生逆反心理，就是大脑不受指挥。由本空前“repeat to yourself ‘I will not sleep’”可知，反复告诉大脑不要睡，及下一句“But instead view this as an instruction to sleep and eye muscles tire quickly as sleep turns up.”可知是把这看作是对睡眠的指示，随着瞌睡虫的到来，眼部肌肉会迅速疲劳，相反的，大脑是不会让你清醒的。分析选项可知D项(大脑不会很好的处理消极情绪)符合题意，故选D项。
[答案] D
5．[解析] 本小题是主旨概括句。分析本段可知，本段主要是讲想象的好处。分析选项可知A项Just imagine(想象)与文中“imagining”复现。故A项符合题意。
[答案] A