[单项选择]More and more residences, businesses, and even government agencies are using telephone answering machines to take messages or give in formation or instructions. Sometimes these machines give (31) instructions, or play messages that are difficult to understand. If you (32) telephone calls, you need to be ready to respond when you get a (33) The most common machine is the (34) used in residence. If you call a home (35) there is a telephone answering machine (36) you will hear several rings and then a recorded message that (37) says something like this: "Hello. We can’t come to the (38) 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," (39) is a brief, high-pitched (40) . After the beep, you can say who you are, whom you want to speak to, and what number the person should call to (41) you, or you can leave a (42) . Some telephone ans
A. that
B. who
C. what
D. which