阅读下面材料，在空白处填入适当的内容（1个单词）或括号内单词的正确形式。
If you are like most people, you’d say that your mouth does most of your communicating. But you might be _________ (surprise) to learn how much you can say with other parts of your head. There are several types of messages that______ (send) by using eyes and head.
Eye Contact
When people see someone they know quite well on the street, they may smile and make brief eye contact and then look away and continue on ________ saying a word. These gestures (手势) are another way of saying, “Hello, I’m glad to see you, but I don’t have time _______ (talk) right now. ”
When _______ (approach) someone on a narrow road, one usually looks_______ (brief) at other person’s eyes and then looks at the part of the road he or she wants to use. The other person generally moves away from the part of the road.
Nodding the head
A very rapid up and down movement means, “I understand. Keep going. ”
_______ slightly slower nod means, “I understand. I agree with you.”
A very slow nod may communicate the message, “I understand, But I ________ (agree).”
Tilting (使倾斜) the head
Head tilts also communicate different messages.
Turning the head so one ear faces the______ (speak) and tilting the head a little means, “I’m interested and I’m listening carefully.”
Tilting the head back and to the side says, “I am thinking about______ you said. ”