问题描述：
一道高中英语选择
Green economy offers a new model ____C__ people could both protect the climate and develop the economy,according to what Li said at the International Cooperative Conference on Green Economy and Climate Change.
A.how B.why C.where D.which
Green economy offers a new model ____C__ people could both protect the climate and develop the economy,according to what Li said at the International Cooperative Conference on Green Economy and Climate Change.
A.how B.why C.where D.which
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