题型： 单项选择题 难度： 简单
    A person with good manners never laughs at people when they are in trouble. ________, he tries to help him.
    A.Instead
    B.Instead of
    C.So
    D.But
    答案
    A
    解析
    Ainstead此处相当于instead of laughing at people when they are in trouble，省略介词宾语时，of也要一起省去。so和but不合句意。