(2009·陕西)Gun control is a subject ________ Americans have argued for a long time.
A.of which B.with which
C.about which D.into which
(2010·上海)Wind power is an ancient source of energy ________ we may return in the near future.
A.on which B.by which C.to which D.from which
She showed the visitors around the museum,the construction ________ had taken more than three years.(2011·江西)
A.for which B.with which
C.of which D.to which
Julie was good at German,French and Russian,all of ________ she spoke fluently.(2011·湖南)
A.who B.whom C.which D.that
Care of the soul is a gradual process ________ even the small details of life should be considered.(2012·湖南)
A.what B.in what C.which D.in which
The man showed us such a heavy stone ________ no one could lift it.
A.that B.as C.which D.and