____ the working efficiency(工作效率), the boss allows the employees to have a coffee break.
_ _ busy schoolwork, the children also have to take arts, music and sports classes in their free time.
The United Kingdom of Great Britain ______ three main parts England, Scotland and Wales.
If you make most of every minute in class day after day, there will be switch in grades.
----Have you been to the Summer Palace? ----Perhaps not in my memory._______, it might have been during my early childhood
_____________ on the portrait, mother was deep in thought.