--- Really? Who will give lecture? What is it about? --- Professor Chen, President of Pe

--- Really? Who will give lecture? What is it about?
--- Professor Chen, President of Peking University, about pollution.
A. the; a
B. a; the
C. the; 不填
D. a; 不填

A. the; aB. a; the(答案→)C. the; 不填D. a; 不填解析：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。

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