问题
选择题
—Was Tom nervous before making a speech to the class?
—Yes, he was. I noticed his hand_______ .
A．shakes
B．shaking
C．shake
D．shook
答案
答案：B
题目分析：句意：---在给同学们做演讲之前汤姆紧张吗？---是的，我注意到他的手在颤抖。Notice sb doing sth 注意某人正在做某事。根据句意，故选B。