We usually use g________, such as waving, nodding our heads, to talk to people who is far away.

gestures

shenm

答案：gestures
考察点：（根据后句所述内容） gesture含义
n. 手势，姿态（gesture的复数形式）
v. 作手势，作姿态（gesture的三单形式）
gesture recognition 手势识别

make a gesture 做手势，表示；做一个手势

n.手势，姿态（gesture的复数形式）
sighs, stances