单选题 Whenever you need Tom, he is always there whether it be an ear or a helping hand, so you can always lean on him.
【正确答案】 A
【答案解析】[解析] 题干中的lean on意为“靠在……上”。A项“依靠”；B项“通过……获益”；C项“代表，代替”；D项“遵守，坚持”，只有A项与题干中划线单词的意义相近。