it is not polite to ( ) others when they are in trouble A get on well.
问题描述：
it is not polite to ( ) others when they are in trouble A get on well.
it is not polite to others when they are in trouble.
A get on well
B smile at
c wait for
dlaugh at
答
d
嘲笑,
全句意思是,当别人陷入困境当中时,嘲笑他们是不礼貌的.