单选题 They are always ready to ______ heavy responsibilities.
  • A. take in
  • B. take on
  • C. put on
  • D. put in
【正确答案】 B
【答案解析】(take on承担)。句意为：他们总是乐于承担重大职责。A．take in欺骗；C． put on穿上，上演；D．put in提交，提出。