【正确答案】 B

【答案解析】rely on：依靠。depend on：依靠，依赖。The town depends almost solely on the tourist trade，小镇的经济主要依靠旅游业。live on：以……为主食。They live on vegetarian food．他们以素食为主。live off：靠……生活。She still lives off her parents．她仍靠父母养活。 believe in：对……有信心。If you believe in yourself you can succeed．如果你相信自己，你就会取得成功。