People in the west make_____a rule to buy Christmas presents for their relatives and friends.
| A．that | B．the thing | C．this | D．it |
Gun control is a subject ________ Americans have argued for a long time.
| A．of which | B．with which |
| C．about which | D．into which |
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 |