【C18】A．depends onB．dependsC．depending onD．independent from

She feel very tired and was glad to him.A、put onB、depend onC、lean on

【C18】A．onB．beforeC．atD．in

Obviously these people can be （relied on) in a crisis.A．lived onB．depended onC．believed in

【C18】A．onB．inC．byD．to

【C18】A．onB．downC．forD．into

The underlined phrase "feed off" in the last paragraph means______.A．depend onB．compete wi