单项选择题 听力原文： Today we are going to practice evaluating a main tool used when addressing groups—the voice. There are three main elements that combine to create either a positive or negative experience for listeners. They can result in a voice that is pleasing to listen to and can be used effectively. Or they can create a voice that doesn't hold attention. Or even worse, causes an adverse reaction. The three elements are volume, pitch and pace. When evaluating volume, keep in mind that a good speaker will adjust to the size of both the room and the audience. Of course, with an amplifying device like a microphone, the speaker can use a natural tone. But speaker should not be dependent on microphones. A good speaker can speak loudly without shouting. The second element, pitch is related to the highness or lowness of the sounds. High pitches are for most people more difficult to listen to. So, in general, speaker should use the lower registers of their voice. During a presentation, it's important to vary pitch to some extent in order to maintain interest. The third element, pace, that is how fast or slow words and sounds are articulated should also be varied. A slower pace can be used to emphasize important points. Note that the time spent not speaking can be meaningful too. Pauses ought to be used to signal transitions or create anticipation. Because a pause gives the listener time to think about what was just said or even to. predict what might come next, it can be very affective when moving from one topic to another. What I'd like you to do now is watch and listen to a videotape and use the forms I gave you to rate the speaking voices you hear. Then tonight, I want you to go home and read a passage into a tape recorder and evaluate your own voice.According to the professor, what can a speaker do to keep an audience's attention?A．Speak very loudly.B．Ask questions frequently.C．Vary tone, volume, and speed of speech.D．Limit the speech to fifteen minutes.

未知题型 一会议组织者必须出3个人来讨论一位应邀演讲者的论文。这3名参加讨论的人将从7名志愿者中选出。已知这7个人中4个人——I,K,L和M对该名演讲者的理论观点持赞成态度，其余的3个人——S,T和U对该名演讲者的理论观点持反对态度。这个组织会议的人在选择参加的人时必须遵从以下原则： 赞成的人中至少有一个当选，反对的人中也至少有一人当选； I入选时，T不能入选； L和M要么同时当选，要么同时落选； K和U要么同时当选，要么同时落选。下面哪一项可能是入选的讨论者?D．L,S,T

单项选择题 听力原文： Hundreds of people have been killed in a stampede during a Shiite religious ceremony in Baghdad. Iraqi officials say at least 640 have died and the figure may rise. The disaster comes as Iraqis are registering to vote on the country's proposed new constitution, an issue which has sharply divided the ShiRe and Sunni communities. From Baghdad John Brain reports: 'The stampede began as up to a million Shiites were making their way towards a holy shrine in the north of the city. Rumors circulated that a suicide bomber was amongst the crowds. In the resulting panic hundreds of worshipers were crushed to death as they tried to escape a crosser bridge over the river Tigris. The bridge's iron railings then collapsed, throwing hundreds more people over the side. Tensions had already been high after several mortars were fired towards the shrine early in the day, killing 16 worshipers, an attack clearly aimed at fermenting sectarian divisions. Iraq's Prime Minister Ibrahim al-Jaafari has declared three days of national mourning.' How many people have died in the disaster?A．Less than 600.B．Less than 640.C．614 or so.D．More than 640.