Mothers holding jobs outside the home should have ________ schedules to make it easier to care fortheir children.[ ]

Do you know the boy_________ father died in the fire?

Never before ______ in greater need of modern public transport than it is today. [ ]

t his job three years ago; _____, he was seriouslyinjured in an accident last week

________they decide which college to go to，students should research the admission procedures