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】 B
【答案解析】解析：lean on“依赖”。benefit from“得益于”；count on“依靠，依赖”；stand for“代表，象征”；stick to“忠于，坚持”。由句意可知，这里应该是表述你可以一直依赖汤姆。故选B。