Military helicopters dropped food and medicine to the earthquake survivors that remained in remote mountain villages.

Rather than _______on a crowded bus, he always prefers _______a bicycle.

The illness from which Mary is suffering has now been _____ as hepatitis （肝炎）.

  Although the manager did not mention any names at meeting, everyone knew  who he was  _____.

His book, which _______ last week, should be another best-seller.