He is the only one of the children who_(speak;speaks;is spoken)ill of others behind their backs.选哪一个,并分析所有答案.
问题描述：
He is the only one of the children who_(speak;speaks;is spoken)ill of others behind their backs.
选哪一个,并分析所有答案.
答
speaks
因为the only one 是主语 单数
谓语也用单数形式，第一个是复数
说别人坏话是主动，所以不用被动语态，第三个不选
答
speaks , 因为先行词被the only 修饰，故是单数。speak ill of 意为说某人坏话。
答
speak ill of sb.是固定短语译为讲某人坏话,结合本句句意他讲别人坏话,而不是别人说他,所以排除最后一项；
再根据就近原则,children是复数,所以选择speak