Face-to-face conversation is a two-way process: You speak to me, I reply to you and so on. Two-way (35)_______ depends on having a coding system that

Face-to-face conversation is a two-way process: You speak to me, I reply to you and so on. Two-way (35)_______ depends on having a coding system that is understood by both sender and (36)_______, and an agreed convention about signaling the beginning and end of the message. In speech, the coding system is the language like English or Spanish; the convention that one person speaks at a time may seem too obvious to mention. In fact, the signals (37)_______ in conversation and meetings are often verbal. For example, lowering the pitch of the voice may mean the end of a sentence, a sharp intake of breath may signal the desire to interrupt, catching the chairman’s eye may indicate the desire to speak in a formal setting like a debate, a clenched fist may indicate anger. When (38)_______ visual signals are not possible, more formal signals may be needed.
35. A. exchange B. interchange C. communication D. correspondence
36. A. announcer B. receiver C. messenger D. transmitter
37. A. use B. are used C. using D. used
38. A. their B. these C. this
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