___________2010 Shanghai World Expo will launch ___________underground network of 700 kilometers of pipes to provide natural hearting and cooling.
A.The; an | B.The; the | C.不填;the | D.不填;an |
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___________2010 Shanghai World Expo will launch ___________underground network of 700 kilometers of pipes to provide natural hearting and cooling.
A.The; an | B.The; the | C.不填;the | D.不填;an |