【正确答案】 B

【答案解析】此题属于语法题。be worth+名词/doing表示“值得”，此处的名词往往是钱数或相当于代价的比喻性名词，例如：It's worth the time and effort we devoted to it．另外，worth后面的动名词总是用主动形式表达被动意义，例如；It is worth considering．故选项[B]worth与 living连用，符合题意。选项[A]worthy表示“值得”，be worthy of+名词/to do，例如：This novel is worthy to be ranked among the masterpieces of Chinese Literature．/It is worthy of the name．选项[C]worthless表示“无价值的”，与句意不符；选项[D]worthwhile表示“值得的”，作表语或定语，例如：It was a worthwhile attempt even though it failed to achieve its aim．