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.
8（）
A．tone
B．noise
C．voice
D．tune
参考答案：A
解析：
语义衔接题。句中的定语从句是对beep(嘟嘟声)的解释说明。根据常识可知，beep应该是乐音或曲调。tone意为“声音，音调”，句中的a brief，high-pitched tone是指“短促、声调很高的乐音”。
[避错指导] noise意为“噪音”，voice意为“声音，嗓音”，显然，这里不是噪音，也不是人说话的声音；tune意为“曲调”，可指音乐的调子，而tone是指声音的音调高低。