As is known，it was Hu Jintao， president in our nation，who gave lecture at the opening ceremony of the Beijing 2008 Olympic.
A. the；a
B. the；/
C. a；the
D. /；a
网友回答
A. the；a
B. the；/
C. a；the
(答案→)D. /；a
解析：
表示职位的名词president作同位语，其前不加冠词；give a lecture为固定用法，意思是“作演讲”。