单选题 John Smith, being a diligent student, never refuses to ______ more responsibilities that are assigned to him.
  • A. take up
  • B. take in
  • C. take off
  • D. take on
【正确答案】 D
【答案解析】[解析] take up意思是“占”,宾语一般为“时间”;take in意思是“接受,容纳,了解”,宾语一般为较为抽象的概念,其被动语态形式be taken in意思为“上当,受骗”;take off一般指“(飞机)起飞”;take on意思为“承担”,后面一般跟“任务,工作”等。