More and more residences, businesses, and even government agencies are using telephone answering machines to take messages or give information or instructions. Sometimes these machines give (1) instructions, or play messages that are difficult to understand. If you (2) telephone calls, you need to be ready to respond when you get a (3)
The most common machine is the (4) used in residence. If you call a home (5) there is a telephone answering machine (6) you will hear several rings and then a recorded message that (7) says something like this: "Hello. We can’t come to the (8) right now. If you want us to call you back, please leave your name and number after the beep." Then you will hear a "beep", (9) is a brief, high-pitched (10) . After the beep, you can say who you are, whom you want to speak to, and what number the person should call to (11) you, or you can leave a (12) . Some telephone answering machines record for only 20 or 30 seconds after the beep, (13) you must respond quickly.
Some large businesses and government agencies are using telephone answering machines to provide information on (14) about which they receive a large volume of (15) . Generally speaking, using these systems (16) you to have a touch-tone phone ( a phone with buttons rather than a rotary dial). The voice on the machine will tell you to (17) a certain button on your telephone if you want information on Topic A, another button for Topic B, and so on. You listen (18) you hear the topic you want to learn about, and then you push the (19) button. Immediately after making your (20) , you will hear a recorded message on the topic.
4（）
A．which
B．where
C．that
D．when
参考答案：B
解析：
结构衔接题。该题位于条件状语从句If．．．中，分析该句子可以看出从句中主谓宾齐全，因此there is a telephone answering只能以从句的形式出现在该条件状语从句中。条件状语从句中的宾语是a home，很容易看出这里there is．．．应该是定语从句，修饰先行词home。根据语法规则可知，这里需要一个作状语的引导词，表示有录音电话的地点，因此正确选项是where。
[避错指导] which引导定语从句时，在句中作主语或宾语，如：The river，which flows through London，is called the Thames. (这条流经伦敦的河叫泰晤士河。)该句中，where也可以用…which代替，起副词作用。that与 which类似，在定语从句中作主语或宾语，如：This is the best article that has been written on the subject．(这是有关这一主题的文章中最好的一篇。)when是关系副词，引导表示时间的定语从句。