得看情况从上下文来看,如：
Who is it?
Who are they?这两个都要看主语.与主语一致
Those who want to take.这是一个定语从句,先行词(被限定修饰名词)为those,它代表those people.为复数,遵循定语从句中的谓语须与先行词一致,所以,用want而不用wants
同理,anyone who wants to take...
anyone 先行词为单数,所以定语从句的的谓语动词与其一致须用单数wants
who is the man that stands there?
Who are the people that are present the meeting