C
With regard to any type of communication there are three basic principles to remember: be clear, be concise and be correct. Let us consider each of these more fully.
Clear. The person who sends the message—the transmitter（传送者）---must be sure about what they need to say. The message should be presented in a logical way, so that the receiver knows exactly what they are required to do. Avoiding any ambiguity. Any lack of clarity means that time will be wasted in seeking confirmation. Concise . Don’t make the message any longer than it should be. Use plain language. Choose your words carefully, and don’t use any more than you really have to. Correct. Pay attention to the wording of the message. Before you send a message, check it to make sure that it doesn’t contain any errors. Many messages fail because they adopt the wrong language for the task. Being too formal can create hostility; while being too casual can mean that your message are not treated seriously.
Finally, don’t forget that communication is a two-way thing. Receivers of messages should give prompt feedback, to let the senders know that the message has been received and understood．This is especially important if the message is not clear. Don’t take action unless you are sure of what you have to do. And if in doubt, check.
64．What’s the best title of the text?
A．How to communicate
B．Communication is a two-way thing
C．Sending and receiving message
D．The basic principles of communication
65．The underlined word “ambiguity” (paragraph 2) roughly means ________
A．too long   B．unclear   C．incorrect   D．not logical
66．From the passage we can infer that________
A．The language you use for a good communication shouldn’t be too formal or too casual.
B．Before you send a message, check it to make sure that it doesn’t contain any errors.
C．If your adopt the wrong language for the task., all messages will fail
D．For the sake of logic, don’t make the message too long.