题目内容：
Which of the following is NOT true about the gestures used in a speech?（）
A.They are only about the use of hands.
B.They are the important aids to the spoken word.
C.They are mostly used to add emphasis.
D.An effective way of improving the use of gestures is to practice in front of a mirror.
参考答案：【答案仅供学习，请勿对照自行用药等】