The school board has teachers to spare no effort to help the students who have fallen behind in studies.
The meal over, the manager went back to the meeting room to ______ their discussion.
Greatly moved by her words, __________.
The population of many Alaskan cities has ______ doubled in the past three years.
---In the past ten years, there have been many changes in family life. --- Are these changes ______?
His sister had become a teacher , ______ was what he wanted to be.