Today APEC is playing a more important role in the world stage，______ purpose is to promote economic cooperation in the Asia-Pacific area．
| A．where | B．whose | C．when | D．Which |
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Today APEC is playing a more important role in the world stage，______ purpose is to promote economic cooperation in the Asia-Pacific area．
| A．where | B．whose | C．when | D．Which |
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