The time he has devoted in the past years __________ the disabled is now consideredto be __________ great value __________ him.

If someone __________you, you should pay ________ attention to him/her.

The boy has a ________ sense of direction and never gets lost in the forest. [ ]

The Chinese government is developing the west of China，which will ______ the people there，especially those who are still leading a poor life.

There is a general among teachers about the need for greater security in schools.