单选题 The officer distributed among the youngster all the blankets and provisions, withholding himself only a canteen.
A. keeping off B. keeping back C. keeping at D. keeping up

【正确答案】 B
【答案解析】withhold：拒绝，不给予；keep off：远离，不让靠近；keep back：不透露或告诉他人，留自己用；keep at：继续，不断；keep up：保持住，防止……降低