问题
选择题
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
答案
答案：D
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”。
