—Where does your sister work, Jack? —She works in a ___________. 

He lost his ______and fell off his bicycle.

In part of China, some people still have difficulty gaining       to social services.

In a time of social reform, people’s state of mind tends to keep _______ with the rapid changes of society.

There are ten＿＿＿teachers and two hundred＿＿＿students in the school．