In order to _____ the development of the west of our country, many special policies have been made, such as encouraging people to go to work in the west.
At present, how we can look after ______ old is becoming ______ hot and severe issue.
It is the duty of the police to ______ social order.
If children are asked to help with housework, they will feel needed. ______, they will learn to take care of themselves.
---Why not wear your miniskirt, Rose? --- Well, my legs are too thick, if you ______ know.
We students are so busy with our homework that we have no time for outdoor exercise, ______ we have the desire.