81．_______

But that doesn’t have to be the outcome．Water shortages do not have to trouble the world----if we start valuing water more than we have in the past．Just as we began to appreciate petroleum more after the 1970s oil crisis, today we must start looking at water from a fresh economic perspective．We can no longer afford to consider water a virtually free resource of which we can use as much as we like in any way we want．

80．_______

Humanity uses a little less than half the water available worldwide．Yet occurrences of shortages and droughts are causing famine and distress in some areas, and industrial and agricultural by-products are polluting water supplies．Since the world’s population is expected to double in the next 50 years, many experts think we are on the edge of a widespread water crisis．

79．It can be inferred from the passage that ______．

　　　 A．honesty should be encouraged in interpersonal communications

　　　 B．more employers will use emails to communicate with their employees

　　　 C．suitable media should be chosen for different communication purposes

　　　 D．email is now the dominant medium of communication within a company

E

78．According to the passage, why are people more likely to tell the truth through certain media of communication?

　　　 A．They are afraid of leaving behind traces of their lies．

　　　 B．They believe that honesty is the best policy．

　　　 C．They tend to be relaxed when using those media．

　　　 D．They are most practiced at those forms of communication．

77．Hancock’s research finding surprised those who believed that_______．

　　　 A．people are less likely to lie in instant messages．

　　　 B．people are unlikely to lie in face-to-face interactions．

　　　 C．people are most likely to lie in email communication．

　　　 D．people are twice as likely to lie in phone conversations．

76．Hancock’s study focuses on _____．

　　　 A．the consequences of lying in various communications media

　　　 B．the success of communications technologies in conveying ideas

　　　 C．people are less likely to lie in instant messages

　　　 D．people’s honesty levels across a range of communications media．

75．What would be the best title for the passage?

　　　 A．How to Be a Perfect Speaker　　　　　　　　 B．How to Make a Perfect Speech

　　　 C．Don’t Expect a Perfect Speech　　　　　　　 D．Don’t Expect Mistakes in a Speech

D

　　　 Communications technologies are far from equal when it comes to conveying the truth．A recent research shows people tend to tell more lies in phone conversations than they are in emails．The fact that emails are automatically recorded and can come back to haunt you appears to be the key to the finding．

Jeff Hancock of Cornell University in Ithaca, New York, asked 30 students to keep a communications diary for a week．In it they noted the number of conversations or email exchanges they had lasting more than 10 minutes, and confessed to how many lies they told．Hancock then worked out the number of lies per conversation for each medium．He found that lies made up 14 percent of emails, 21 percent of instant messages, 27 percent of face-to-face interactions and an astonishing 37 of phone calls．

His results to be presented at the conference on human-computer interaction in Vienna, Austria, in April, have surprised psychologists．Some expected emailers to be the biggest liars, reasoning that because deception makes people uncomfortable, the detachment(非直接接触)of emailing would make it easier to lie．Others expected people to be more in face-to-face exchanges because we are most practiced at that form of communication．

But Hancock says it is also crucial whether a conversation is being recorded and could be reread, and whether it occurs in real time．“People appear to be afraid to lie when they know the communication could later be used to hold them to account,” he says．This is why fewer lies appear in email than on the phone．

“People are also more likely to lie in real time in an instant message or phone call than if they have time to think of a response,” say Hancock．He found many lies are spontaneous responses to an unexpected demand, such as, “Do you like my dress?”

Hancock hopes his research will help companies work out the best ways for their employees to communicate．For instance, the phone might be the best medium for sales where employees are encouraged to stretch the truth．But, given his result, work assessment where honesty is a priority, might be best done using email．

74．It can be inferred from the passage that_____

　　　 A．giving a speech is like giving a performance

　　　 B．one or two mistakes in a speech may not be bad

　　　 C．the listeners should pay more attention to how a speech is made

　　　 D．the more mistakes a speaker makes, the more attractive he will be

73．You don’t remember obvious mistakes in a speech because ______．

　　　 A．you miss the main points of the speech

　　　 B．you don’t fully understand the speech

　　　 C．you don’t know what the speaker plans to say

　　　 D．you find the way of speech-making more important

72．The underlined part an the first paragraph means that no one will ______

　　　 A．be smarter than you　　　　　　　　　　　　　　 B．notice your mistakes

　　　 C．do better than you　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　 D．know what you arc talking about