If the government takes measures to enrich senior citizens’ social and spiritual life, it ____ help develop a truly harmonious society.

 Jack _______ swim when he was five years old. 

— Must I stay here with you?—No, you_____. You may go home, but you ______go to the net bar.

—Could I invite my friends to my birthday party?—Sorry, you ______.

She was greatly shocked at the scene before her eyes. Never did she expect that the local conditions ______ be so awful.