— _______late for school again, Tim!
— Sorry, I_______.
A:Don't; won't
B:Don't be; won't
C:Don't be; don't
D:Don't; don't
中国******提出的“丝绸之路经济带”和“21世纪海上丝绸之路”成为当前的热点话题。读“一带一路”图,中国通过“一带一路”与其他国家和地区进行大批商品贸易,最适宜的运输方式是( )
—It's time to have class. Please stop _________.
— OK.
下列物体中属于光源的是( )