――Dady,when can I join the Basketball Club――You can when you _______ up.

When I reach the school grounds there are lots of “good mornings” _____me _____the boys, many _____whom have walked a long way, sometimes up _____two hours, to get to the school[ ]

They have arrived at lunchtime but their flight was delayed.

What’s wrong with you -________.

oblem of the widening gap between the rich and the poor, if not properly ______, can result in many serious social tensions.