It is not always easy for the public to see _____ use a new invention can be of to human life.
He had little idea that it was getting so late, ___________?
--Do you live____________ near Jim? --No, he lives in another part of the town.
On the long journey, Peter ________ a most interesting guide. We all had a wonderful time.
__________ entered the office when he realized that he had forgotten his report.
For many Beijingers, dreams of living in ___________ green area are becoming___________ reality.