[单项选择]

All of us communicate with one another verbally (口头的) as well as non-verbally. Most of the time we are not aware that we’re doing it. We wave a hand, meet someone else’s eyes or look" away, shift positions in a chair. We make these movements unconsciously. But researchers have discovered that there is a system to them almost as consistent (一致的) and comprehensible as language.
Every culture has its body language. The way an Englishman crosses his legs is nothing like the way a male American does it. In talking, Americans arc likely to end a statement with a lowering of the eyelids. They conclude a question with a lift of the hand or a widening of the eyes. With a future-tense verb they often gesture with a forward movement. There are regional idioms too. Your sex, ethnic background, social class and personal style all influence your body language. Nevertheless, you move and gesture within a certain idiom.
Usually, the wordless communication acts to
A. always expresses the message precisely
B. usually doesn’t match the language
C. sometimes isolates a meaning
D. often shows the speaker’s true emotions