At the end of the meeting.it was announced that an agreement ．( )A．has been reachedB．has reachedC．had been reachedD．had reached 题目和参考答案——青夏教育精英家教网—

题目内容

10．At the end of the meeting，it was announced that an agreement _____．（　　）

	A．	has been reached		B．	has reached
	C．	had been reached		D．	had reached

分析会议结束时，宣布达成了一项协议．

解答 C 考查被动语态．分析句子可知，it是形式主语，that an agreement 引导的从句是真正的主语，在这个主语从句中reach与主语agreement之间是被动关系，所以用被动语态，故答案选C．

点评被动语态由"助动词be+及物动词的过去分词"构成．被动语态的时态变化只改变be的形式，过去分词部分不变．疑问式和否定式的变化也如此．掌握各种时态的被动语态是解题的关键．

练习册系列答案

1．China has achieved great developmentin increasing people's life expectancy．

18．Building Trust in a Relationship Again
Trust is a learned behavior that we gain from past experiences，（36）B．That is a risk．But you can't be successful when there's a lack of trust in a relationship that results from an action where the wrongdoer（做坏事的人） takes no responsibility to fix（修补） the mistake．
Unfortunately，we've all been victims（受害者） of betrayal（背叛）．Whether we've been suffer from，lied to，misled，or cheated on，there are different levels of losing trust．Sometimes people simply can't trust anymore，（37）E．It's understandable，but if you're willing to build trust in a relationship again，we have some steps you can take to get you there．
•（38）Ahaving confidence in yourself will help you make better choices because you can see what the best outcome （结果）would be for your well-being．
•（39）CIf you've been betrayed，you are the victim of your circumstance（环境）．But there's a difference between being a victim and living with a"victim mentality"．At some point in all of our lives，we'll have our trust tested or violated．
•You didn't lose"everything"．Once trust is lost，what is left？Instead of looking at the situation from this hopeless angle（角度），look at everything you still have and be thankful for all of the good in your life．（40）G instead，it's a healthy way to work through the experience to allow room for positive growth and forgiveness（宽恕）．

A．Learn to really trust yourself．
B．It is putting confidence in someone．
C．Stop regarding yourself as the victim．
D．Remember that you can expect the best in return．
E．They've been too badly hurt and they can't bear （忍受）to let it happen again．
F．This knowledge carries over in their attitude toward their future relationships．
G．Seeing the positive side of things doesn't mean you're ignoring（不理） what happened．

5．Most animals have little connection with animals of a different kind，unless they hunt them for food．Sometimes，however，two kinds of animals come together in a partnership （伙伴关系） which is good for both of them．You may have noticed some birds sitting on the backs of sheep．This is not because they want a ride，but because they find easy food in the parasites （寄生虫） on sheep．The sheep allow the birds to do so because they remove the cause of discomfort．So although they can manage without each other，they do better together．
Sometimes an animal has a plant partner．The relationship develops until the two partners cannot manage without each other．This is so in the corals （珊瑚） of the sea．In their skins they have tiny plants which act as"dustman"，taking some of the waste products from the coral and giving in return oxygen which the animal needs to breathe．If the plants are killed，or are even prevented from light so that they cannot live normally，the corals will die．

21．Some birds like to sit on a sheep becauseA．
A．they can eat its parasites
B．they depend on the sheep for existence
C．they enjoy traveling with the sheep
D．they find the position most comfortable
22．The underlined word"they"in the last sentence of the first paragraph refers to
B．
A．birds and parasites
B．birds and sheep
C．parasites and sheep
D．sheep，birds and parasites
23．We learn from the text that the coral depends on the plant forD．
A．comfort B．light C．food D．oxygen
24．What does the second paragraph mainly discuss？A
A．Some animals and plants depend on each other for existence．
B．Some animals and plants develop their relationship easily．
C．Some plants depend on each other for food．
D．Some animals live better together．

15．You can always turn to your teachers when you are in trouble because they are reliable．In other words，they are worth depending on．

2．Think about the different ways that people use wind．You can use it to fly a kite or to sail a boat．Wind is one of our cleanest and richest power sources，as well as one of the oldest．Evidence shows that windmills（风车） began to be used in ancient Iran back in the seventh century BC．They were first introduced to Europe during the 1100s，when armies returned from the Middle East with knowledge of using wind power．
For many centuries，people used windmills to grind（磨碎） wheat into flour or pump water from deep underground．When electricity was discovered in the late 1800s，people living in remote areas began to use them to produce electricity．This allowed them to have electric lights and radio．However，by the 19 40s when electricity was available to people in almost all areas of the United States，windmills were rarely used．
During the 1970s，people started becoming concerned about the pollution that is created when coal and gas are burned to produce electricity．People also realized that the supply of coal and gas would not last forever．Then，wind was rediscovered，though it means higher costs．Today，there is a global movement to supply more and more of our electricity through the use of wind．
28．From the text we know that windmillsC
A．have rarely been used since electricity was discovered
B．have a history of more than 2，800 years
C．used to supply power to radio in remote areas
D．were invented by European armies
29．What was a new use for wind power in the late 19gh century？C
A．Sailing a boat．
B．Grinding wheat into flour．
C．Producing electricity．
D．Pumping water from underground．
30．One of the reasons wind was rediscovered in the 1970s is thatB
A．it is one of the oldest power sources
B．wind power is cleaner
C．it was cheaper to create energy from wind
D．the supply of coal and gas failed to meet needs
31．What would the author probably discuss in the paragraph that follows？
B
A．The adv antages of wind power．
B．The global trend towards producing power from wind．
C．The worldwide movement to save energy．
D．The design of wind power plants．

19．19世纪90年代后期，他迁居加尔维斯顿，直到1899年在那里去世，也就是飓风袭击的前一年．
By the late 1890s，hehadmovedto Galveston，where he died in 1899，a year before the hurricane struck．

1．In the computer age，most of us think of a broadband（宽带） Internet connection to be common．Whether wired or wireless，today's connections are many times faster．Videos play smoothly； complex websites load quickly； and the files are much bigger too．
But there's still  a catch，of course．You have to live near enough to a major city to get broadband Internet．If you don't，it's slow for you to use dial-up connection．And for those living really far out，there may be no Internet connection at all．
Technology experts often talk about the"last mile"problem，which refers to the difficulty of making Internet available for remote places．It is much more difficult to deliver connection to those living far from cities，especially in developing countries．Internet service providers，for their part，have been unwilling to provide connection to areas with smaller population，where the Internet users wouldn't cover the expense．
Still，the"last mile"problem remains hard to deal with．There will always be somewhere that doesn't have an affordable broadband connection．But someday that might not matter．If the rapid progress in cell phone technology is any indication（迹象），it may not be too long before an Internet connection simply follows you wherever you go．

54．The underlined part"a catch"（in Paragraph 2）probably means"A"．
A．a hidden problem     B．a rare challenge
C．a complete failure   D．a possible way
55．What can we know from the third paragraph？D
A．Internet connection has not been popular in most cities．
B．Internet service providers care about countryside customers．
C．Computer is popular in developing countries．
D．It is hard to bring Internet connection to users in remote areas．
56．What may eventually settle the"last mile"problem？D
A．The broadband connection's getting faster．
B．More and more Internet users．
C．More and more Internet connections．
D．The rapid progress in cell phone technology．

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