单项选择题

Managers spend a great deal of their time communicating orally, whether (1) person or on the phone. Some businesspeople prefer to (2) this way, feeling that oral channels allow them (3) convey their true messages most accurately. (4) vital component of oral communication is (5) , the skill of receiving a message (6) interpreting its genuine meaning by accurately grasping (7) facts and feelings it conveys. While listening is the first communication (8) that people learn in life and the one (9) use the most often, it is also the one in which they receive the (10) formal training.
It is tempting to think that listening is easy—after all, it seems to require (11) effort. This appearance is deceptive, however. (12) the average person talks at a rate of roughly 150 words per minute, the brain can (13) up to 400 words per minute. This discrepancy can lead (14) boredom, inattention, and misinterpretation. (15) fact, immediately after listening to a message, the (16) person can recall only half of it. Several days later, the recall percentage (17) to 25 percent or less.
Noise, interference with messages (18) transmission, can occur as a result of physical factors (19) poor reception of a radio message or inability (20) hear a conversation with a co-worker. In other instances, misinterpretations produce faulty communications.

A.the
B.on
C.for
D.all