Is that the reason ________he explained to all at the meeting for his carelessness in his work? Actually we think he is a man who is hard ________ himself especially in work.

____________ people went to theconcert which was held in People’s Square the night of May Day.

Our country, together with others in the Third World,________ hard to build a harmonious homeland for human beings now.[ ]

When ___________ your brother ___________ his hometown—He ____________ for nearly three years.

Today we have too many choices of communication through advanced technology，but we seem ___________the joy of communicating face to face．