really?Who will give----lecture?What is it about?——professor Chen,-----president of BeijingUniversity .It's about the latest development of modern physics.A the;a B a;/C a;the D The ;/选什么为什么

问题描述:

really?Who will give----lecture?What is it about?——professor Chen,-----president of Beijing
University .It's about the latest development of modern physics.
A the;a B a;/
C a;the D The ;/
选什么为什么