【正确答案】 B

【答案解析】[解析] live on：以……为食，例如：Most of Asians live on rice．多数亚洲人以大米为主食。lived off：以……为生，例如：I don't know how she manages to live off her painting．我不知道她怎么能以画画为生。depended on：依靠、信赖，例如：You can depend on him to make a sound choice．你可以依靠他作出正确的选择。believed in：信任、相信，例如：We believe in him，who is always true to his word．我们信任他，他总是说话算话。