单选题 When you speak on the telephone, you cannot use your facial (面部的) expression, eye contact and gestures to help communicate your message. Your voice must do the job.
A good voice is pleasant to listen to because it communicates a positive message. Keep in mind the following qualities of a good voice:
Speak in a voice neither too loud nor too soft. Speak louder when giving important information.
Speak slowly enough so that the listener has a chance to understand your message without your having to repeat it. Keep in mind that as you speak the other person may be taking notes.
Pronunciation is the correct way to say a word. To avoid mispronouncing (读错音) words, you may wish to check the pronunciation of unfamiliar words in the dictionary before you use them.
People with an accent unlike yours may not understand your pronunciation of some words. You also may not understand the pronunciation of some of their words. In these cases, careful pronunciation is very important for effective communication. You may need to repeat or spell words that are unusual or easy to be misunderstood.
单选题 When speaking on the phone, the essential factor for successful communication is your ______.
【正确答案】 A
【答案解析】[解析] 事实细节题。本题询问打电话时成功交流的关键因素。根据本文第一段第二句提供的信息“必须由你的声音来完成这项‘工作’”可知，声音在其中起着关键的作用。故A项(声音)为正确答案。
B(手势)、C(眼神交流)、D(面部表情)无法在电话交流时体现出来，故此三项均为错误选项。
单选题 To give important information, a person speaking on the phone should ______.
【正确答案】 D
【答案解析】[解析] 事实细节题。本题询问通话时突出重要信息的做法。通过第三段第二句“传递重要信息时讲话声音稍微高一点”可知，谈及重要信息需要提高音量。因此，D项(提高音量)为正确答案。
A项(举止得当)与原义内容不符，应先予以排除；文中第五段提到了生词(unfamiliar words)，但文中没有提及常用词(familiar words)，所以B项(使用熟悉的词汇或语言)也应予以排除；C项(降低说话的声音)与原文意思相反。
单选题 The speaker is advised to speak slowly in order to help the listener to ______.
【正确答案】 D
【答案解析】[解析] 事实细节题。本题询问通话时语速放慢的作用。第四段第二句“你说话的时候对方或许正在记录”正是第一句中放慢说话速度的原因，故D项(做记录)为正确答案。
A项(记住所说的某些话)与C项(核对信息)在原文中并未提及，因而排除；B项(重复信息)并不是放缓语速的结果，而是说话者在对方未明白其表达所做的补偿行为，与题中含义无关，故该项也为错误选项。
单选题 To avoid mispronouncing unfamiliar words, you are advised to ______.
【正确答案】 A
【答案解析】[解析] 事实细节题。本题询问避免读错生词的方法。根据文中第五段第二句中的“为了避免读错音。在使用之前你最好在词典里查阅一下那些生词的发音”，可推知A项(查阅词典)为正确选项。
B项(大声发音)对吐词发音正确与否没有作用，应先予排除；C项(选用其他的词语表达)及D(向他人求助)在文中均未提及，故也都排除。
单选题 Speakers sometimes need to spell some words to help listeners to understand ______.
【正确答案】 B
【答案解析】[解析] 事实细节题。本题询问拼写一些字词的作用。由文中第六段中的“或许你有必要重复或拼出那些不常用或容易引起误解的字词”可知，需要拼写的情况有两种，即生词或有歧义的词，故B项为正确选项。
A项(长句)、C(难题)和D(重要的表达)原文并没有提及，均排除。