6．While overall rates of sudden infant death syndromes（綜合征） have decreased in recent years，deaths from sleep suffocation（窒息） ________ over the same time period．（　　）
A．doubleB．have been doubling
C．have doubledD．doubled

分析 雖然嬰兒突然死亡綜合征的總比率近幾年已經(jīng)下降，而同一時(shí)期因?yàn)樗咧舷⒍劳龅臄?shù)量加倍了．

解答 答案是C．本題考查現(xiàn)在完成時(shí)．句中over the same period指代的是上文的recent years，是與現(xiàn)在相聯(lián)系的段時(shí)間，用現(xiàn)在完成時(shí)，故選C．現(xiàn)在完成進(jìn)行時(shí)表示動(dòng)作仍在進(jìn)行中，而本題中double的動(dòng)作已經(jīng)發(fā)生，故排除B．

點(diǎn)評(píng) 對(duì)時(shí)態(tài)的選擇，要在把握時(shí)態(tài)的基本用法的基礎(chǔ)上，根據(jù)具體語(yǔ)境和題干中的時(shí)間推斷時(shí)態(tài)，同時(shí)關(guān)注特殊的結(jié)構(gòu)．

練習(xí)冊(cè)系列答案
相關(guān)習(xí)題

科目：高中英語(yǔ) 來(lái)源： 題型：閱讀理解

16．Life is difficult．
    It is great truth because once we truly understand and accept it，then life is no longer difficult．
 Most do not fully see this truth．Instead，they complain about their problems and difficulties as if life should be easy．It seems to them that difficulties represent a special kind of suffering especially forced upon them or upon their familie s，their class，or even their nation．
 What makes life difficult is that the process of facing and solving problems is a painful one．Problems，depending on their nature，cause us sadness，loneliness or regret or anger and fear．These are uncomfortable feelings，often as painful as any kind of physical pain．And since life causes an endless series of problems，life is always difficult and is full of pain as well as joy．
Yet，it is in this whole process of solving problems that life has its meaning．Problems are the serious tests that tell us success from failure． When we desire to encourage the growth of human spirit，we encourage the human ability to solve problems，just as in school we set problems for our children to solve．It is through the pain of meeting and working out problems that we learn．As Benjamin Franklin said，"Those things that hurt instruct．"It is for this reason that wise people learn not to fear but to welcome the pain of problems．
25．From the passage，it can be inferred thatB．
A．everybody has problems
B．we become stronger by meeting and solving the problems of life
C．life is difficult because our problems bring us pain
D．people like to complain about their problems
26． The writer probably used just one short sentence in the first paragraph toD．
A．save space              
B．persuade readers
C．makes readers laugh     
D．get readers'attention
27． The main idea of Paragraph 3 is thatD．                               
A．most people feel life is easy    
B．the writer feels life is easy
C．the writer likes to complain about his problems
D．most people complain about how hard their lives are
28． According to the passage，we give schoolchildren difficult problems to solve in order toA．
A．encourage them to learn
B．teach them to fear the pain of solving the problem
C．helps them learn to deal with pain
D．teach them how to solve problems．

查看答案和解析>>

科目：高中英語(yǔ) 來(lái)源： 題型：選擇題

17．It may rain．So you'd better take an umbrella just ______．（　　）
A．for exampleB．by chanceC．on purposeD．in case

查看答案和解析>>

科目：高中英語(yǔ) 來(lái)源： 題型：閱讀理解

14．Towards the end of Middle English，a sudden change in pronunciation started，with vowels （元音） being pronounced shorter and shorter．From the 16th century the British had contact with many people from around the world．This meant that lots of new vocabulary entered the language．The invention of printing also meant that there was now a common language in print．Books became cheaper and more people learned to read．Spelling and grammar became fixed，and the dialect of London became the standard．In 1604the first English dictionary came out．
Early Modern English and Late Modern English are mostly different in the number of words．Late Modern English has many more words，mainly because of the following two reasons：First，the Industrial Revolution led to the need for new words．Second，the British Empire covered one quarter of the earth's surface，and the English language took in foreign words from many countries．
From around 1600，the English colonization （殖民地化） of North America led to American English．Some English pronunciations and words"froze"when they reached America．In some ways，American English is more like the English of Shakespeare than modern British English．Some expressions that are called"American English"are in fact from British expressions．They were kept in the colonies while lost for a time in Britain．Spanish also had an influence on American English．For example，words like canyon，ranch，stampede and vigilante are from Spanish．They entered English by the people of Spain who settled in the American West．French words and West African words also influenced American English．
Today，American English has a greater influence，because of the USA's movies，television，popular music，trade and technology．
8．What helped to increase the vocabulary of Late Modern English？D
a．the invention of printing
b．the Industrial Revolution
c．the colonization
d．the contact with other countries
A．a(chǎn)，b，c      
B．a(chǎn)，c，d      
C．a(chǎn)，b，d        
D．b，c，d
9．The third paragraph mainly talks aboutB．
A．English colonies in North America
B．the development of American English
C．other languages'influence on American English
D．the difference between American English and British English
10．The underlined word"froze"can best be replaced byA．
A．remained unchanged    
B．disappeared     
C．improved       
D．kept active．

查看答案和解析>>

科目：高中英語(yǔ) 來(lái)源： 題型：閱讀理解

1．Smile，when making an introduction
Every day we meet people in a number of business and social situations．（36）FIt's important to do so in a proper way，no matter whether you are introducing yourself to someone，or introducing two people to each other．To keep you aware of this，we have gathered tips to make a proper introduction．
Always stand when making an introduction
When you are seated and someone comes up to greet you，make the effort to stand up．（37）E．
Always maintain eye contact while making an introduction
Many people are not aware of the value of this simple action．（38）B．
Always introduce a person of less authority to one of greater authority
（39）C．For example，when introducing your supervisor to a job candidate，you would give your supervisor's name first．
In a situation where rank is unimportant，an introduction is based on sex and age
A man is presented to a woman and a younger woman to an older woman．What if you find yourself in a situation where you have forgotten the other person's name？（40）A．By doing this，you will usually cause the other person to do the same．This is not the ideal situation，but it does happen to all of us．

A．Start with a handshake and reintroduce yourself．
B．When you make eye contact，you are giving a confident image．
C．The most important thing to remember is to say the most important person's name first．
D．Standing up is the most important to meet a person．
E．By doing this，you show respect for yourself and the other person．
F．And the way we meet and greet them creates an impression．
G．By staring at the other person，you show your interest．

查看答案和解析>>

科目：高中英語(yǔ) 來(lái)源： 題型：填空題

11．The most （61）energetic（energy） and important festivals are the ones that look forward to the end of winter and the coming of spring．At the Spring Festival in China，people eat dumplings，fish and meat and may give children（62）lucky（luck） money in red paper．There are dragon dances and carnivals，（63）andfamilies celebrate the Lunar New Year together．Some Western countries have very exciting carnivals，（64）whichtake place forty days before Easter，---in February．These carnivals might include parades，dancing in the streets day and night，loud music and colorful （65）clothing（cloth） of all kinds．Easter is an important religious and social festival for Christians （66）around/in the world．It celebrates the return of Jesus from （67）thedead and the coming of spring and new life．Japan's Cherry Blossom Festival happens a little （68）later（late）．The country，covered with cherry tree flowers，（69）looks（look） as though it is covered with pink snow．
People love to get together（70）to eat（eat），drink and have fun with each other．Festivals let us enjoy life，be proud of our customs and forget our work for a little while．

查看答案和解析>>

科目：高中英語(yǔ) 來(lái)源： 題型：閱讀理解

18．只要在過(guò)程中盡力了，你就沒(méi)有必要太重視比賽的結(jié)果．（need n．）As long as you have tried your best in the process，there is no need for you to take the result of th ematch too seriously．．

查看答案和解析>>

科目：高中英語(yǔ) 來(lái)源： 題型：閱讀理解

11．Monthly Talks at London Canal Museum
Our monthly talks start at 19：30 on the first Thursday of each month except August．Admission is at normal charges and you don't need to book．They end around 21：00．
November 7th
The Canal Pioneers，by Chris Lewis．James Brindley is recognized as one of the leading early canal engineers．He was also a major player in training others in the art of canal planning and building．Chris Lewis will explain how Brindley made such a positive contribution to the education of that group of early"civil engineers"．
December 5th
Ice for the Metropolis，by Malcolm Tucker．Well before the arrival of freezers，there was a demand for ice for food preservation and catering．Malcolm will explain the history of importing natural ice and the technology of building ice wells，and how London's ice trade grew．
February 6th
An Update on the Cotswold Canals，by Liz Payne．The Stroudwater Canal is moving towards reopening．The Thames and Severn Canal will take a little longer．We will have a report on the present state of play．
March 6th
Eyots and Aits-Thames Islands，by Miranda Vickers．The Thames has many islands．Miranda has undertaken a review of all of them．She will tell us about those of greatest interest．
Online bookings：www．canalmuseum．org．uk/book
More info：www．canalmuseum．org．uk/whatson
London Canal Museum
1213 New Wharf Road，London NI 9RT
www．canalmuseum．org．uk　www．canalmuseum．mobi
Tel：020 7713 0836
33．When is the talk on James Brindley？D
A．February 6th．
B．March 6th．
C．December 5th．
D．November 7th．
34．What is the topic of the talk in February？D
A．The Canal Pioneers．
B．Ice for the Metropolis．
C．Eyots and Aits-Thames Islands．
D．An Update on the Cotswold Canals．
35．Who will give the talk on the islands in the Thames？D
A．Liz Payne．
B．Malcolm Tucker．
C．Chris Lewis．
D．Miranda Vickers．

查看答案和解析>>

科目：高中英語(yǔ) 來(lái)源： 題型：選擇題

12．It was on the principle that all men are created equal _____________the nation was founded．（　　）
A．so thatB．thatC．for whichD．which was why

查看答案和解析>>

同步練習(xí)冊(cè)答案