单选题 He says, you must take in those responsibilities.

【正确答案】 B
【答案解析】[解析] 本句意为:他说,你必须承担起这些责任。A.take away拿走,减去;B.take on承担,从事;C.take out拿出,取出;D.take off起飞,脱下;因此选项B为答案。