3、疑问副词when, why, where,how How the prisoner escaped is attery When the presider nt will visi it chichas not been made public yet, n Where the meeting will be held hasn't been decided 4、关系代词what,这里what没有疑问含义, 相当于 the thing which What we lack is fund What you are doing is against me.3、疑问副词when, why, where, how. How the prisoner escaped is a mystery. When the president will visit China has not been made public yet. Where the meeting will be held hasn’t been decided. 4、关系代词what, 这里what没有疑问含义， 相当于the thing which What we lack is fund. What you are doing is against me