A:My mother is serious and she never tells stories to me.
B:My mother is strict and she never tells jokes to me.
C:My mother is strict and she never tells stories to me.
2×4=____
2006年11月21日,中国、欧盟、美国、日本、韩国、俄罗斯和印度七方在法国总统府正式签署一个能源方面的联合实施协定及相关文件,该协定中的能源是指____能源.