2020-2021学年高中英语(北师大版)必修5双基限时练14.docx

双基限时练(十四)　Unit 14　Careers
Grammar
Ⅰ.语法专练(1－5改为间接引语，6－10改为直接引语)
1．Mary said, “I'll go over my lessons once again.”
Mary said ______________________________________________
答案　she would go over her lessons once again
2．The singer asked me, “Do you like Blues？”
The singer asked me ____________________________________.
答案　if/whether I like Blues
3．“Why don't you go hiking？” asked James.
James ______________________________________________.
答案　advised me to go hiking
4．She said to the pupils, “Don't all answer at once.”
She told the pupils ______________________________________.
答案　not to answer all at once
5．He asked, “how many tickets do you have？”
He asked me _______________________________________.
答案　how many tickets I had
6．The girl told me that she had phoned her parents three days before.
The girl said to me, “________________________________.”
答案　I phoned my parents three days ago
7．My friend asked me what I was doing at 9：00 a．m. the day before.
My friend asked, “__________________________？”
答案　What were you doing at 9：00 a．m. yesterday
8．The young man said that every dog has his day.
The young man said, “______________________________.”
答案　Every dog has his day
9．He said those books were his.
He said, “_________________________________________.”
答案　These books are mine
10．She asked me to have a rest.
She said to me, “_______________________________________.”
答案　Please have a rest
Ⅱ.完形填空
Do you ever feel like the weather is out to get you? All week long, it seems, you sit __1__ at school while the sun shines outside. Then, as soon as the weekend comes, the sky __2__ gray. There's rain in the forecast.
In some ways, you may be right. Weekend weather
__3__ from weekday weather in certain places, say researchers who studied more than 40 years of weather data __4__ the world. They focused on temperature differences between daytime highs and nighttime __5__. This difference measurement __6__ the diurnal temperature range, or DTR.
Part of the study involved 660 weather __7__ in the continental United States. At more than 230 of these sites, __8__ average DTR for Saturday, Sunday, and Monday was different from the average DTR for Wednesday, Thursday, and Friday, the researchers __9__. The difference was small — only several __10__ of a Celsius degree—but the pattern was striking enough to make the scientists take notice.
In the __11__ U．S., temperature ranges were typically broader on weekends. In the Midwest, weekdays saw __12__ daily temperature variations.
This sort of __13__ rise and fall doesn't line up with any natural cycles, the researchers say.__14__， they blame human activities, possibly air pollution from those activities, __15__ these weather effects. For example, tiny particles in the air could affect the __16__ of cloud cover, __17__ would in turn affect daily temperatures.
So, tiny windborne particles from California, generated on weekdays, might first affect weather __18__ to home in the southwest, __19__ later influence Midwestern weather.
It looks like your weekend weather has a lot do with which way the wind __20__ and where it comes from.
1. A. outside 　　　　　　 B. inside
C. in D. out
2. A. changes B. becomes
C. turns D. looks
3. A. differs B. different
C. difference D. difficult
4. A. from B. around
C. from around D. around from
5. A. highs B. tall
C. small D. lows
6. A. called B. is called
C. calls D. calling
7. A. stations B. radios
C. rooms D. factors
8．A. a B. an
C. / D. the
9. A. find B. have found
C. found D. have been found
10. A. tenth B. tenths
C. ten D. half dozen
11. A. southwest B. southwestern
C. southwestward D. southwestwards
12. A. large B. largest
C. larger D. the largest
13. A. weekly B. week
C. week's D. weeks'
14. A. But B. Whatever
C. However D. Instead
15. A. to B. from
C. for D. by
16. A. number B. total
C. quality D. amount
17. A. that B. /
C. what D. which
18. A. close B. closely
C. closer D. closest
19. A. now B. since
C. then D. finally
20. A. strikes B. blows
C. beats D. hits
答案与解析　
1．B　while在此处表示对比，和后面的outside相呼应，故应当用inside。
2．C　气候的变化要用turn(转化；变得)。change后面要加to或into。
3．A　在这里应当用动词， differ from ...“和……不同”。
4．C　考查重叠介词的用法。争辩者们争辩的天气变化数据来自世界各地，所以用from around the world。
5．D　前面用的是daytime highs, 后面要用nighttime lows来进行呼应，所以选D项。
6．B　习惯用法，“被叫做……”要用be called, 由于前面的主语是单数，所以用is called。
7．A　在这里说的是气象站，所以用station。而radio(收音机); room(房间); factors(因素)均不符合题意。
8．D　考查冠词的用法。这里的the average DTR for Saturday, Sunday, and Monday是特指，与后面的the average DTR for Wednesday, Thursday, and Friday形成对比。
9．C　争辩人员发觉这个现象是过去的事情，所以用一般过去时。
10．B　考查分数的表达法，分母要用序数词，由于分子是several大于1，所以分母序数词要用复数加s，因此选B项。
11．B　这里要选择一个形容词修饰U.S.，表示“西南方的”，故B项为正确答案。而southwest是名词，意为“西南方”； southwestward是形容词，意为“向西南方的”； southwestwards是副词，意为“向西南”。
12．C　weekdays和前面的weekend形成对比，是两者之间的比较，故要用比较级，所以选C项。
13．A　weekly每周一次的。
14．D　和前面的情形形成对比，很明显要用instead来表示不干某事，而去做另外的事情。
15．C　blame sb. for sth.“因某事而责怪某人”。
16．D　the amount of“……的量”。
17．D　这里是一个非限制性定语从句，要用which来指代前面整个句子的内容。
18．A　close to ...“离……很近”，而closely是副词，意为“接近地”，不符合句意。
19．C　和前面的first形成呼应，用then表示先后挨次。
20．B　表示“刮风”，要用动词blow。
Ⅲ.阅读理解

To become a doctor in the United States, students usually attend four years of medical school after they complete college. Then these young doctors work in hospitals for several years to complete a training program called a residency.
These medical residents provide hospitals with needed services in return for not much pay. They work under the supervision (管理) of medical professors and more experienced doctors. Medical residents treat patients. They carry out tests. They perform operations. They complete records. In hospitals with few nurses, residents also do work formerly done by nurses. Some medical residents work one­hundred or more hours in a single week. They often work for more than thirty­six hours at a time before they can rest.
Critics of this system say medical residents work too long and do not get enough rest. They say these young doctors may be too tired to perform their medical duties effectively. Now, the government will limit the number of hours of work that residents can work. Most doctors in training will be limited to eighty­four hours of work each week. They will have work periods of no more than twenty­four hours at one time. They will have ten hours of rest between work periods.
Medical residents will have one day each week when they do not have to work. Any work they accept outside their hospitals will be limited. Experienced doctors and medical professors will closely supervise the residents to make sure they are not too tired to work.
Many medical residents welcomed the work limits. Others,_however, said the new policy may interfere with patient care and their own medical education.
1．If a first­year college student in America wants to be a doctor, he has to wait for ________.
A. 4 years　　　　　　　　 B. 8 years
C. at least 10 years D. more than 20 years
答案与解析　C　推理推断题。由第一段可知，美国的同学要想成为一名医生，在完成高校毕业(四年)后还要在医学院校学习四年，然后再经过好几年的实习期，故选C项。
2. Medical residents are not responsible for ________.
A. supervising students B. treating patients
C. carrying out tests D. doing operations
答案与解析　A　细节理解题。由其次段中的“Medical residents treat patients. They carry out tests. They perform operations. They complete records.”可知， A项不包括在其职责之内。
3．Why does the government limit the number of hours that residents work?
A. Medical residents get too much money.
B. Medical residents should go back to school to study.
C. There is not enough work for nurses.
D. Medical residents may make mistakes if they work too long.
答案与解析　D　细节理解题。由第三段其次句可知，政府缩短实习生的工作时间是由于过长的工作时间会使他们过于劳累，以至于无法高效率地履行医药工作者的职责，导致消灭失误。
4．The underlined word “Others” in the last paragraph refers to ________.
A. some critics
B. some medical professors
C. some experienced doctors
D. some medical students
答案与解析　D　推理推断题。此处others与many medical residents相呼应。others指住院实习生中不支持缩短工作时间这一举措的那部分， D项与之最为相近。