问题
选择题
One of the main __________ of the summit was “sustainable development”,or the question how we can continue developing the world without damaging the environment.
A．headlines
B．themes
C．topics
D．deadlines
答案
答案：B
headline大字标题；theme主题,主旋律；topic话题,主题；deadline期限。这里指的是大会的主题,应用theme。