They have no idea at all （ ）.
（A）where he has gone
（B）where did he go
（C）which place has he gone
（D）where has he gone
It never occurred to me （ ） you could succeed in persuading him to change his mind.
（A）which
（B）what
（C）that
（D）if
It is not immediately clear （ ） the financial crisis will soon be over.
（A）since
（B）what
（C）when
（D）whether
