---Really? Who will give ______ lecture? What is it about?---Professor Chen, ______ President of Peking University, about pollution.A.the; aB.a; theC.the; 不填D.a; 不填
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C解析由Really?(真的吗？)可判断上一句可能是：I hear that there will be a lecture. 因此第一空应填the。President of Peking University在句中用作同位语，故前面不用冠词。